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Assorted Bolivian Mineral Specimens from Classic and Contemporary Localities


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(click on the pictures to enlarge)

Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b152a.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b152b.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b152c.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b152d.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b152e.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b152f.JPG]


No. BOL711B152 - $ 300.00

Cassiterite with Tourmaline

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 3.2 x 2.3 x 2.1 cm (miniature)


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This piece is a good, lustrous, sharp, black to dark golden colored cyclic twinned crystal group which is associated with small acicular crystals of rarely seen greenish-brown Tourmaline. Only a small percentage of the Cassiterites from Viloco are associated with Tourmaline. I photographed the Tourmalines under the microscope to better illustrate their unique nature. A cool association specimen from this classic locality.



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(click on the pictures to enlarge)

Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b153a.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b153b.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b153c.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b153d.JPG]


No. BOL711B153 - $ 225.00

Cassiterite

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 3.0 x 2.3 x 1.3 cm (thumbnail)
Largest Crystal: 1.4 cm


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This piece features several fine, lustrous, sharp, black cyclic twinned crystals which are associated with Quartz on matrix. A worthwhile smaller specimen of this classic material.



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(click on the pictures to enlarge)

Cassiterite with Quartz / Smoky Quartz Phantoms and Limonite after Pyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b154a.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms and Limonite after Pyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b154b.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms and Limonite after Pyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b154c.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms and Limonite after Pyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b154d.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms and Limonite after Pyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b154e.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms and Limonite after Pyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b154f.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms and Limonite after Pyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b154g.JPG]


No. BOL711B154 - SOLD

Cassiterite with Quartz / Smoky Quartz Phantoms and Limonite after Pyrite

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 14.8 x 9.7 x 6.2 cm (cabinet)
Largest Crystal: 1.3 cm


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This large display piece is a filled with fist class quality, sharp lustrous, black cyclic twinned crystals which are associated with unique and very rarely seen prismatic Quartz crystals containing dark Smoky Quartz phantoms. Additionally there is a rather unusual 4.0 x 3.7 cm “mound” of metallic golden Pyrite that is partially altering to Limonite. For the size, associations and three-dimensional appeal, this is a special Cassiterite specimen, and certainly one of the more interesting and eye-catching pieces that I’ve offered.



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(click on the pictures to enlarge)

Cassiterite (cyclic and “drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b155a.JPG] Cassiterite (cyclic and “drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b155b.JPG] Cassiterite (cyclic and “drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b155c.JPG] Cassiterite (cyclic and “drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b155d.JPG] Cassiterite (cyclic and “drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b155e.JPG]


No. BOL711B155 - SOLD

Cassiterite (cyclic and “drillbit” twins)

Locality: Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia

Specimen Size: 8.5 x 6.1 x 3.8 cm (small cabinet)
Largest Crystal: 2.3 cm


Huanuni is actually the RICHEST Cassiterite deposit in the world, and although it’s best known for its phosphate species, occasionally some fine quality Cassiterite specimens are found. I would say that this particular piece is one of the very best Cassiterites from Huanuni that I’ve handled. This impressive, classic, sharp, lustrous group of cyclic twinned crystals and “drillbit” twinned crystals is certainly fine quality for the species and the locality. It’s not common to find two different twinning habits of Cassiterite on the same specimen from Huanuni, and typically the classic “drillbit” habit is more common. The sheer heft of the piece lets you know that it’s pure Cassiterite. Good quality all the way around, and if you’re a collector of Cassiterites or Bolivian minerals, this would make a superb addition to your collection.



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(click on the pictures to enlarge)

Cassiterite (superb large crystals) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b156a.JPG] Cassiterite (superb large crystals) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b156b.JPG] Cassiterite (superb large crystals) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b156c.JPG] Cassiterite (superb large crystals) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b156d.JPG] Cassiterite (superb large crystals) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b156e.JPG] Cassiterite (superb large crystals) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b156f.JPG]


No. BOL711B156 - SOLD

Cassiterite (superb large crystals)

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 6.8 x 4.3 x 3.2 cm (small cabinet)
Largest Cassiterite: 3.5 cm


ex.  Richard A. Kosnar


This specimen is the best in its size range that I have to offer, and certainly one of the most significant and extraordinary specimens of Cassiterite that I’ve handled. It was mined in 1980, and comes directly from my father’s collection. From the standpoint of quality, there are few pieces that I have seen which are better. The first and perhaps most important aspect is the bright luster of the cyclic twinned crystals, which combined with the amazing sharpness and form, gives the piece a huge advantage over the vast majority of Cassiterites from Viloco. To top it off, the large twin at the top of the specimen measures a full 3.5 cm, which is certainly impressive for the material, as most rarely exceed 1-2 cm. Lastly, the piece is not your typical jet black color, as it actually shows a rich amber hue when backlit, which is only seen in a very small percentage of Cassiterites from Viloco. As you can see from the photos, the piece is very sculptural with great aesthetics. The display side is damage free, but obviously the back is contacted where it was removed from the pocket. Rarely does a Cassiterite of this magnitude appear on the market, and for the price, it’s a great deal as I know many knowledgeable dealers would have this piece priced well over $5k.



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(click on the pictures to enlarge)

Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b157a.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b157b.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b157c.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b157d.JPG]


No. BOL711B157 - SOLD

Cassiterite

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 5.3 x 4.4 x 3.6 cm (small cabinet)
Largest Crystal: 2.7 cm


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This piece is a great, classic, lustrous, sharp, black and brown cyclic twinned crystal group with minimal damage and good sized crystals. For the size and quality, it’s a great piece for the price.



To order this specimen click here




(click on the pictures to enlarge)

Cassiterite (GEM quality!) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b158a.JPG] Cassiterite (GEM quality!) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b158b.JPG] Cassiterite (GEM quality!) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b158c.JPG] Cassiterite (GEM quality!) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b158d.JPG] Cassiterite (GEM quality!) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b158e.JPG] Cassiterite (GEM quality!) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b158f.JPG] Cassiterite (GEM quality!) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b158g.JPG] Cassiterite (GEM quality!) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b158h.JPG]


No. BOL711B158 - $ 700.00

Cassiterite (GEM quality!)

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 3.3 x 2.4 x 1.8 cm (miniature)
Largest Crystal: 2.2 cm


ex.  Richard A. Kosnar


A very impressive and certainly hard to find GEM quality Cassiterite specimen from the famous Viloco Mine. This locality bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. A fine, sharp, lustrous, beautiful, well-formed cyclic twinned crystal group sits atop tan compressed rhomobohedra of Siderite to create a beautiful “black and tan” association piece. The most impressive aspect of the specimen is the fact that the Cassiterite is incredibly gemmy when backlit, showing a range of colors from a light golden hue to an amber-cognac shade, and even the highly desirable and rarely seen RED, which is virtually impossible to find at Viloco. The piece comes from my father’s collection, and was mined in the early 1980’s. His catalogue number (399) is still glued to the base of the specimen. A small nick on the back of the Cassiterite keeps the piece from being 100% perfect, but it’s such a great rarity to have colorful, gem quality Cassiterite with any associated species from Viloco, that the damage is easily forgiven. Better quality than the photos indicate, and certainly a step above the vast majority of Cassiterites from Viloco.



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(click on the pictures to enlarge)

Cassiterite on Arsenopyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b159a.JPG] Cassiterite on Arsenopyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b159b.JPG] Cassiterite on Arsenopyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b159c.JPG] Cassiterite on Arsenopyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b159d.JPG] Cassiterite on Arsenopyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b159e.JPG] Cassiterite on Arsenopyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b159f.JPG] Cassiterite on Arsenopyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b159g.JPG] Cassiterite on Arsenopyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b159h.JPG] Cassiterite on Arsenopyrite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b159i.JPG]


No. BOL711B159 - $ 0.00

Cassiterite on Arsenopyrite

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 5.1 x 4.0 x 3.8 cm (small cabinet)
Largest Cassiterite: 1.3 cm


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This attractive association specimens features excellent, sharp, lustrous, jet-black to gemmy golden amber colored cyclic twinned crystals of Cassiterite aesthetically sitting on rarely seen, silvery, metallic “cockscomb” crystals of Arsenopyrite. The quality of the Cassiterites is wonderful, and the contrasting Arsenopyrite makes for a very eye-catching and desirable display specimen. Less than 1% of the Cassiterites from Viloco are found with Arsenopyrite, and it’s typically massive, and doesn’t feature such attractive crystallization like this!



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(click on the pictures to enlarge)

Cassiterite with Siderite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b160a.JPG] Cassiterite with Siderite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b160b.JPG] Cassiterite with Siderite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b160c.JPG] Cassiterite with Siderite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b160d.JPG]


No. BOL711B160 - SOLD

Cassiterite with Siderite

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 4.7 x 3.7 x 1.8 cm (miniature)
Largest Crystal: 1.4 cm


The quality of the Cassiterites on this specimen is outstanding. They’re so sharp, smooth and lustrous, that they almost look machined! Several fantastic, very sharp, eye-catching, highly lustrous, jet black, amazingly well-formed cyclic twinned crystals are aesthetically intergrown with tan compressed rhombohedra of Siderite. There are actually a few small gem quality Quartz crystals on the piece as well for a final touch. Virtually damage free and top-notch both from the standpoint of excellence and associations!



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(click on the pictures to enlarge)

Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b161a.JPG] Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b161b.JPG] Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b161c.JPG] Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b161d.JPG]


No. BOL711B161 - $ 325.00

Cassiterite (“drillbit” twins)

Locality: Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia

Specimen Size: 3.2 x 2.6 x 2.1 cm (miniature)
Largest Crystal: 1.5 cm


Huanuni is actually the RICHEST Cassiterite deposit in the world, and although it’s best known for its phosphate species, occasionally some fine quality Cassiterite specimens are found. This attractive, classic, sharp, lustrous, jet-black group of “drillbit” twinned crystals is certainly fine quality for the species and the locality. Good quality all the way around, and if you’re a collector of Cassiterites or Bolivian minerals, this would make a great addition to your collection.



To order this specimen click here




(click on the pictures to enlarge)

Cassiterite (gemmy) on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b162a.JPG] Cassiterite (gemmy) on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b162b.JPG] Cassiterite (gemmy) on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b162c.JPG] Cassiterite (gemmy) on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b162d.JPG] Cassiterite (gemmy) on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b162e.JPG] Cassiterite (gemmy) on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b162f.JPG] Cassiterite (gemmy) on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b162g.JPG]


No. BOL711B162 - $ 425.00

Cassiterite (gemmy) on Quartz

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 4.1 x 2.7 x 2.4 cm (miniature)
Largest Crystal: 2.1 cm


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This piece features, classic, lustrous, sharp, black and golden cyclic twinned crystal groups of Cassiterite sitting on white prismatic Quartz crystals. Very little damage, and aesthetic to be sure. Hard to photograph and better in person. A large percentage of the Cassiterites from this mine are rarely found with any associated minerals, let alone attractive contrasting white Quartz like this one.



To order this specimen click here




(click on the pictures to enlarge)

Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b163a.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b163b.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b163c.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b163d.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b163e.JPG] Cassiterite with Tourmaline from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b163f.JPG]


No. BOL711B163 - $ 400.00

Cassiterite with Tourmaline

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 4.3 x 3.3 x 2.3 cm (miniature)
Largest Crystal: 2.0 cm


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This piece is a good, lustrous, sharp, black to very dark golden colored cyclic twinned crystal group which is associated with small acicular crystals of rarely seen greenish-brown Tourmaline. Only a small percentage of the Cassiterites from Viloco are associated with Tourmaline. I photographed the Tourmalines under the microscope to better illustrate their unique nature. A cool association specimen from this classic locality.



To order this specimen click here




(click on the pictures to enlarge)

Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b164a.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b164b.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b164c.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b164d.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b164e.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b164f.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b164g.JPG]


No. BOL711B164 - $ 775.00

Cassiterite on Quartz

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 5.2 x 4.8 x 2.8 cm (small cabinet)
Largest Crystal: 1.7 cm


This particular piece is a superb quality Cassiterite from the standpoint of luster, sharpness and the fact that there are TWO distinct twinning habits on the same specimen. An impressive, classic, sharp, lustrous group of black to gemmy golden color cyclic twinned crystals sit atop prismatic white Quartz matrix. The most interesting aspect of the piece is the fact that there are a few RARELY seen “drillbit” habit twinned groups. It’s not common to find two different twinning habits of Cassiterite on the same specimen from Viloco, and the “drillbit” habit is next to impossible to find in my experience. If you’re a collector of Cassiterites or Bolivian minerals, this would make a superb addition to your collection. Very little damage, and really striking for the species and the locality. The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable.



To order this specimen click here




(click on the pictures to enlarge)

Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b165a.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b165b.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b165c.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b165d.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b165e.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b165f.JPG]


No. BOL711B165 - $ 175.00

Cassiterite with Quartz / Smoky Quartz Phantoms

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 6.8 x 5.5 x 3.7 cm (small cabinet)
Largest Cassiterite: 9 mm


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This attractive display piece features a few sharp lustrous, black cyclic twinned crystals which are associated with unique and very rarely seen prismatic Quartz crystals (measuring up to 2.6 cm) containing and rarely seen small Smoky Quartz phantoms. Additionally there are some small Cassiterite crystals that are actually “floating” inside the Quartz crystals. The presence of the Smoky Quartz phantoms and sheer three-dimensional appeal, this is a special Cassiterite specimen, and certainly one of the more interesting and eye-catching pieces that I’ve offered. It may be more of a Quartz specimen than a Cassiterite specimen, but it’s definitely different than typical pieces from Viloco.



To order this specimen click here




(click on the pictures to enlarge)

Cassiterite with Quartz (scepters) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b167a.JPG] Cassiterite with Quartz (scepters) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b167b.JPG] Cassiterite with Quartz (scepters) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b167c.JPG] Cassiterite with Quartz (scepters) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b167d.JPG] Cassiterite with Quartz (scepters) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b167e.JPG] Cassiterite with Quartz (scepters) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b167f.JPG] Cassiterite with Quartz (scepters) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b167g.JPG]


No. BOL711B167 - SOLD

Cassiterite with Quartz (scepters)

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 4.7 x 4.3 x 3.2 cm (miniature)
Largest Cassiterite: 1.8 cm


A great quality Cassiterite / Quartz specimen from this classic tin deposit. Several fantastic, harp, lustrous, jet black, amazingly well-formed cyclic twinned crystals are associated with gem/gemmy prismatic simple prisms and scepter habit Quartz crystals! In my experience, Quartz scepters from Viloco are exceedingly rare. Great quality all the way around and very eye-catching! .



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Cassiterite (large twin) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b168a.JPG] Cassiterite (large twin) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b168b.JPG] Cassiterite (large twin) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b168c.JPG] Cassiterite (large twin) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b168d.JPG] Cassiterite (large twin) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b168e.JPG] Cassiterite (large twin) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b168f.JPG] Cassiterite (large twin) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b168g.JPG] Cassiterite (large twin) from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b168h.JPG]


No. BOL711B168 - $ 2100.00

Cassiterite (large twin)

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 5.1 x 4.4 x 3.8 cm (small cabinet)


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This piece is one of the single largest twinned Cassiterites from Viloco that I’ve handled. Crystals of this size from Viloco are almost impossible to find. It is a superb, lustrous, sharp, classic, somewhat gemmy, jet-black to deep maple amber colored cyclic twinned crystal group with minor Quartz and matrix on the underside. Amazingly, the piece is in great shape all the way around, with only a little roughness near the base of the piece where it detached from the pocket wall. If you’re in the market for a large and impressive Cassiterite twin from Viloco, this is a great example of this well-known material.



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Cassiterite on matrix from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b169a.JPG] Cassiterite on matrix from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b169b.JPG] Cassiterite on matrix from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b169c.JPG] Cassiterite on matrix from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b169d.JPG]


No. BOL711B169 - $ 175.00

Cassiterite on matrix

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 4.3 x 2.6 x 1.4 cm (miniature)
Largest Crystal: 1.3 cm


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This piece features several superb, lustrous, sharp, black cyclic twinned crystals which are associated with Quartz on matrix. A worthwhile and aesthetic smaller specimen of this classic material.



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(click on the pictures to enlarge)

Cassiterite with Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b170a.JPG] Cassiterite with Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b170b.JPG] Cassiterite with Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b170c.JPG]


No. BOL711B170 - $ 250.00

Cassiterite with Quartz

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 2.8 x 2.5 x 2.0 cm (thumbnail)


ex.  Richard A. Kosnar


An attractive full sized thumbnail specimen from this classic locality. This locality bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. A fine, sharp, lustrous, beautiful, well-formed cyclic twinned crystal group is associated with minor Quartz on the underside. The piece shows a light golden color when backlit, which is not common for Cassiterite in general. The piece comes from my father’s collection, and was mined in the early 1980’s. His catalogue number (334) is still glued to the base of the specimen. Great quality all the way around, and certainly better than most from this locality.



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(click on the pictures to enlarge)

Cassiterite with Quartz from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b171a.JPG] Cassiterite with Quartz from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b171b.JPG] Cassiterite with Quartz from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b171c.JPG]


No. BOL711B171 - $ 500.00

Cassiterite with Quartz

Locality: Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia

Specimen Size: 4.1 x 3.0 x 2.8 cm (miniature)
Largest Crystal: 1.8 cm


ex.  Richard A. Kosnar


A very attractive display specimen from this classic locality. Huanuni is actually the RICHEST Cassiterite deposit in the world, and although it’s best known for its phosphate species, occasionally some fine quality Cassiterite specimens are found. Several fine, sharp, lustrous, beautiful, well-formed cyclic twinned crystals are associated with sharp, prismatic, white/colorless Quartz crystals aesthetically flaring out of the sides. The piece comes from my father’s collection, and was mined in the early 1980’s. His catalogue number (1887) is still glued to the base of the specimen. Great quality all the way around with very little damage, and certainly better than most from Huanuni from the standpoint of aesthetics.



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(click on the pictures to enlarge)

Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b172a.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b172b.JPG]


No. BOL711B172 - $ 325.00

Cassiterite

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 4.9 x 3.4 x 1.7 cm (miniature)
Largest Crystal: 1.6 cm


The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This piece is a great, classic, lustrous, sharp, black cyclic twinned crystal group with virtually no damage and decent sized crystals. For the size and quality, it’s a great piece for the price.



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(click on the pictures to enlarge)

Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b173a.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b173b.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b173c.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b173d.JPG] Cassiterite with Quartz / Smoky Quartz Phantoms from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b173e.JPG]


No. BOL711B173 - $ 450.00

Cassiterite with Quartz / Smoky Quartz Phantoms

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 5.0 x 3.8 x 2.7 cm (miniature)
Largest Cassiterite: 1.5 cm


This attractive display piece features a few sharp lustrous, black cyclic twinned crystals which are associated with unique prismatic Quartz crystals containing and rarely seen small Smoky Quartz phantoms. Based upon the presence of the Smoky Quartz phantoms and the sheer three-dimensional appeal, this is a special Cassiterite, and certainly one of the more interesting and eye-catching pieces that I’ve offered. Definitely different from your typical Viloco specimens. The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable.



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(click on the pictures to enlarge)

Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b174a.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b174b.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b174c.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b174d.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b174e.JPG]


No. BOL711B174 - $ 375.00

Cassiterite

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 4.8 x 3.4 x 1.8 cm (miniature)
Largest Crystal: 2.1 cm


ex.  Richard A. Kosnar


An attractive miniature specimen from this classic locality. This locality bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. Several great, sharp, semi-lustrous, beautiful, well-formed black and brown cyclic twinned crystals make for an appealing display piece. A slight brown color can be seen when the piece was backlit, which is not common for Cassiterite in general. The piece comes from my father’s collection, and was mined in the early 1980’s. His catalogue number (214) is still glued to the base of the specimen. Great quality all the way around, and certainly better than most from this locality.



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(click on the pictures to enlarge)

Cassiterite on Quartz with Marcasite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b175a.JPG] Cassiterite on Quartz with Marcasite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b175b.JPG] Cassiterite on Quartz with Marcasite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b175c.JPG] Cassiterite on Quartz with Marcasite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b175d.JPG] Cassiterite on Quartz with Marcasite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b175e.JPG] Cassiterite on Quartz with Marcasite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b175f.JPG]


No. BOL711B175 - SOLD

Cassiterite on Quartz with Marcasite

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 4.6 x 4.3 x 2.8 cm (miniature)
Largest Crystal: 7 mm


A very aesthetic display specimen from this classic locality. The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. A few fine, sharp, lustrous, well-formed black and brown cyclic twinned crystals are aesthetically sitting atop a beautiful group of gemmy, colorless Quartz crystals. Additionally the piece has a light “dusting” of golden Marcasite to create a lovely contrast of color. The piece is very eye-catching, and almost resembles a scarecrow when viewed from the right angle. Great quality all the way around, and certainly better than most from this locality.



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(click on the pictures to enlarge)

Cassiterite with Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b176a.JPG] Cassiterite with Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b176b.JPG] Cassiterite with Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b176c.JPG] Cassiterite with Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b176d.JPG] Cassiterite with Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b176e.JPG]


No. BOL711B176 - $ 650.00

Cassiterite with Quartz

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 5.3 x 3.8 x 2.7 cm (small cabinet)
Largest Crystal: 1.8 cm


The quality of the Cassiterites on this specimen is wonderful. They’re so sharp, smooth and lustrous, that they almost look machined! Many fantastic, very sharp, eye-catching, highly lustrous, jet black, amazingly well-formed cyclic twinned crystals are aesthetically with a few GEM quality, sharp, colorless Quartz crystals. Virtually damage free on the display side, and top-notch both from the standpoint of excellence and the Quartz association. Better in person, and certainly eye-catching for the material. The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world.



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(click on the pictures to enlarge)

Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b177a.JPG] Cassiterite from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b177b.JPG]


No. BOL711B177 - $ 300.00

Cassiterite

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 3.2 x 2.4 x 2.1 cm (miniature)
Largest Crystal: 2.0 cm


A unique Cassiterite from this classic tin deposit in Bolivia. Viloco (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable. This piece is a superb, highly lustrous, sharp, eye-catching, jet-black cyclic twinned crystal group with unusual crystallization for the locality. The main twin is strangely elongated and/or compressed, and really stands out amongst so many I have seen. Good condition, and certainly different from the typical Cassiterites from Viloco. If you’re a Cassiterite collector, or a Bolivian mineral collector, be sure to pick up this one.



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(click on the pictures to enlarge)

Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b178a.JPG] Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b178b.JPG] Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b178c.JPG] Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b178d.JPG] Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b178e.JPG] Cassiterite (“drillbit” twins) from Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia [./bolivia711/bol711b178f.JPG]


No. BOL711B178 - $ 300.00

Cassiterite (“drillbit” twins)

Locality: Huanuni mine, Huanuni, Dalence Province, Oruro Department, Bolivia

Specimen Size: 3.3 x 2.6 x 2.1 cm (miniature)
Largest Crystal: 1.8 cm


Huanuni is actually the RICHEST Cassiterite deposit in the world, and although it’s best known for its phosphate species, occasionally some fine quality Cassiterite specimens are found. This attractive, classic, sharp, lustrous, jet-black group of “drillbit” twinned crystals is certainly fine quality for the species and the locality. Good quality all the way around, and if you’re a collector of Cassiterites or Bolivian minerals, this would make a great addition to your collection.



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(click on the pictures to enlarge)

Cassiterite with Siderite and Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b179a.JPG] Cassiterite with Siderite and Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b179b.JPG] Cassiterite with Siderite and Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b179c.JPG]


No. BOL711B179 - $ 600.00

Cassiterite with Siderite and Quartz

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 5.0 x 3.8 x 2.1 cm (miniature)
Largest Crystal: 2.0 cm


The quality of the Cassiterites on this specimen is outstanding. They’re very sharp, smooth and lustrous, and good sized for the material! Several fantastic, very sharp, eye-catching, highly lustrous, jet-black to golden colored, amazingly well-formed cyclic twinned crystals are aesthetically intergrown with tan compressed rhombohedra of Siderite. There are actually a few small Quartz crystals on the piece as well for a final touch. Very minimal damage, and top-notch both from the standpoint of excellence and associations!



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(click on the pictures to enlarge)

Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b180a.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b180b.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b180c.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b180d.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b180e.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b180f.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b180g.JPG] Cassiterite on Quartz from Viloco Mine, Loayza Province, La Paz Department, Bolivia [./bolivia711/bol711b180h.JPG]


No. BOL711B180 - SOLD

Cassiterite on Quartz

Locality: Viloco Mine, Loayza Province, La Paz Department, Bolivia

Specimen Size: 7.3 x 4.2 x 2.8 cm (small cabinet)
Largest Crystal: 4 mm


This particular piece is a great quality Cassiterite from the standpoint of luster, sharpness and the fact that there are so many crystals on the same specimen. Hundreds of impressive, classic, sharp, highly lustrous group of black cyclic twinned crystals sit atop prismatic white/colorless Quartz crystals. Some of the Quartz crystals have an unusual “curved” shape, which I haven’t seen before from Viloco. If you’re a collector of Cassiterites or Bolivian minerals, this would make a superb addition to your collection. There is virtually no damage and the piece is really striking for the species and the locality. The Viloco Mine (sometimes called Araca) for many years has stood as one of the top Cassiterite localities in the world. This mine is still active today, and bears the unique distinction of producing the only GEM quality (facet grade) Cassiterites from any mine in Bolivia. Considering the millions of tons of tin ore that Bolivia has yielded, the fact that only one mine ever produced transparent Cassiterite is remarkable.



To order this specimen click here




(click on the pictures to enlarge)

Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b181a.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b181b.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b181c.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b181d.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b181e.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b181f.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b181g.JPG]


No. BOL711B181 - $ 600.00

Vauxite (outstanding color!)

Locality: Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY)

Specimen Size: 4.8 x 4.2 x 0.7 cm (miniature)


A remarkable, very well crystallized, OUTSTANDING blue color, ridiculously rare specimen consisting of radiating crystal aggregates of Vauxite on clay matrix. I have photographed the crystals under the microscope to show that they are truly terminated crystals and not just a blue mass. I must point out that these crystals of Vauxite show the most electric neon blue color that I've seen for the species, but it appears that the rich color is actually due to a micro coating of transparent Quartz on top of the Vauxite. It is very difficult to obtain any specimens of this incredibly beautiful phosphate, but this color is simply unheard of. This piece is from a find in July of 2007 at the type locality for the species which was originally discovered along the Contacto and San Jose veins in this mine and first described by Sam Gordon and Mark Bandy. To the best of my knowledge, Vauxite is still only found in one locality in the world, and you would be hard pressed to find better color Vauxite anywhere!



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(click on the pictures to enlarge)

Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b182a.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b182b.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b182c.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b182d.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b182e.JPG] Vauxite (outstanding color!) from Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY) [./bolivia711/bol711b182f.JPG]


No. BOL711B182 - $ 500.00

Vauxite (outstanding color!)

Locality: Siglo XX Mine (Siglo Veinte Mine), Llallagua, Bustillo Province, Potosi Department, Bolivia (TYPE LOCALITY)

Specimen Size: 3.3 x 2.6 x 1.4 cm (miniature)


A remarkable, very well crystallized, OUTSTANDING blue color, ridiculously rare specimen consisting of radiating crystal aggregates of Vauxite on clay matrix. I have photographed the crystals under the microscope to show that they are truly terminated crystals and not just a blue mass. I must point out that these crystals of Vauxite show the most electric neon blue color that I've seen for the species, but it appears that the rich color is actually due to a micro coating of transparent Quartz on top of the Vauxite. It is very difficult to obtain any specimens of this incredibly beautiful phosphate, but this color is simply unheard of. This piece is from a find in July of 2007 at the type locality for the species which was originally discovered along the Contacto and San Jose veins in this mine and first described by Sam Gordon and Mark Bandy. To the best of my knowledge, Vauxite is still only found in one locality in the world, and you would be hard pressed to find better color Vauxite anywhere!



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