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Thumbnail Mix November 2007




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Copper from Phoenix mine, Keweenaw County, Michigan [./TNMix807and1107/CuMITN8071a.JPG]


No. CUMI TN 8071 - SOLD

Copper

Locality: Phoenix mine, Keweenaw County, Michigan

Specimen Size: 2.2 x 1.8 x 0.9 cm (thumbnail)


With the thousands of specimens to come out of, how often does one encounter a competition quality Copper thumbnail of this material? I've honestly searched for a specimen like this from Michigan for years, and this is the finest one I have had to offer. It features a very aesthetic, well-formed, well-defined, sharp dodecahedron of Copper with a classic patina on a small mound of matrix. The crystal is complete all the way around to boot. This pieces leaves nothing to be desired, and would make virtually any thumbnail collector happy to own. A fantastic thumbnail display specimen.



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Stilbite from Calumet mine, Turret District, Chaffee County, Colorado [./TNMix807and1107/StilCOTN8071a.JPG] Stilbite from Calumet mine, Turret District, Chaffee County, Colorado [./TNMix807and1107/StilCOTN8071b.JPG]


No. Stil CO TN 8071 - $ 95.00

Stilbite

Locality: Calumet mine, Turret District, Chaffee County, Colorado

Specimen Size: 2.3 x 2.0 x 1.5 cm (thumbnail)


Yes, Stilbite from an iron mine! The Calumet mine dates back to the 1880's and produced nearly 230,000 tons of iron ore over the course of its life. Most collectors are probably familiar with the classic Epidote specimens from this mine, but few people know about the attractive Stilbite specimens that came from Calumet. This piece is comprised of several tan colored Stilbite blades on minor matrix. Obviously they are no comparison to India or New Jersey in terms of size and quality, but these are very good for Calumet, and would make a fine addition to any Colorado collection.

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Goethite with Goethite with Goethite with Goethite with


No. GOE TN 8071 - SOLD

Goethite with "Onegite"

Locality: The Planetarium Pocket, 9-2000, Dreamtime Claim, Teller County, Colorado

Specimen Size: 2.1 x 1.8 x 1.8 cm (thumbnail)


The various pegmatites surrounding the Pike's Peak area in Colorado are most famous for their world-class Amazonite specimens, but they do not receive nearly enough recognition for producing some of the finest Goethite specimens extant. This highly aesthetic "spray" of semi-metallic, silvery-black colored Goethite crystals is easily one of the most attractive thumbnails of this material that I have seen. The crystals are accented with classic "Onegite" crystals which are essentially Amethyst crystals with Goethite inclusions. Some of the "Onegite" crystals are actually Smoky Quartz, but you can see a distinct purple color in others. A great example of a classic, top quality Goethite from this prolific mineral-producing region in Colorado.



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Gold from Dixie mine, Idaho Springs, Clear Creek County, Colorado [./TNMix807and1107/GoldCOTN8071m.JPG] Gold from Dixie mine, Idaho Springs, Clear Creek County, Colorado [./TNMix807and1107/GoldCOTN8071f.JPG] Gold from Dixie mine, Idaho Springs, Clear Creek County, Colorado [./TNMix807and1107/GoldCOTN8071b.JPG]


No. GOLD CO TN 8071 - SOLD

Gold

Locality: Dixie mine, Idaho Springs, Clear Creek County, Colorado

Specimen Size: 1.9 x 1.7 x 1.0 cm (thumbnail)


The Dixie mine is probably the most famous Gold mine in Clear Creek County for mineral collectors. My father actually owned and operated this mine for a short time in the 1970's. As far as Gold goes, Dixie mine specimens are among the easiest to recognize from Colorado. This piece is comprised of classic platy "leaves" of bright colored Gold forming a very charming and three-dimensional display specimen. The individual "leaves" have crystalline faces which is often seen in specimens from the Dixie. Fine quality specimens, (even the smaller ones) are highly prized by Colorado collectors. This is a very good Dixie thumbnail, and would make a wonderful addition to any thumbnail suite or Gold collection.



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Quartz on Rhodochrosite from Sunnyside mine, near Gladstone, San Juan County, Colorado [./TNMix807and1107/QtzRhTN8071c.JPG] Quartz on Rhodochrosite from Sunnyside mine, near Gladstone, San Juan County, Colorado [./TNMix807and1107/QtzRhTN8071b.JPG]


No. QtzRh TN 8071 - $ 155.00

Quartz on Rhodochrosite

Locality: Sunnyside mine, near Gladstone, San Juan County, Colorado

Specimen Size: 2.4 x 2.1 x 1.7 cm (thumbnail)


Here we have a classic association of Quartz with Rhodochrosite from the Sunnyside mine. The Quartz crystals are unusually stubby for this locality, and are virtually water-clear at the tips. They have razor sharp faces with equally impressive reflective luster. The final touch to this piece is the small pink rhombohedra of Rhodochrosite at the base. A great quality thumbnail of this well known material.

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Sphalerite on Chalcopyrite from Emperious vein, Commodore mine, Creede, Mineral County, Colorado [./TNMix807and1107/SphalCOTN8073a.JPG] Sphalerite on Chalcopyrite from Emperious vein, Commodore mine, Creede, Mineral County, Colorado [./TNMix807and1107/SphalCOTN8073f.JPG] Sphalerite on Chalcopyrite from Emperious vein, Commodore mine, Creede, Mineral County, Colorado [./TNMix807and1107/SphalCOTN8073b.JPG]


No. SPHAL CO TN 8073 - SOLD

Sphalerite on Chalcopyrite

Locality: Emperious vein, Commodore mine, Creede, Mineral County, Colorado

Specimen Size: 2.5 x 2.5 x 2.2 cm (thumbnail)


The Commodore mine has produced some of the most colorful and attractive Sphalerite specimens in all of Colorado, or the United States for that matter. These specimens were all over the market 30 years ago, and now they are highly prized and highly sought after by Colorado collectors. My brother has cut some of the most vivid and sparkling gemstones from broken Sphalerite crystals that came out of the Commodore and they have always sold the second he puts them out for sale. I can only think of a few world localities that produce/produced such superb gemmy Sphalerite crystals in any quantity over the last 50 years, and the specimens from Creede truly are classics. This specimen features dramatic, complexly crystallized/twinned, sharp, lustrous, multi color (green, gold and orange) crystals surrounding a golden Chalcopyrite crystal. When the Sphalerite is backlit, it shows rich color and is clearly gemmy enough to facet superb quality gems. Do not miss out on this historic and flashy Colorado Sphalerite.



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Amethyst from Biedell Gulch, Colorado [./TNMix807and1107/AmethTN8071a.JPG] Amethyst from Biedell Gulch, Colorado [./TNMix807and1107/AmethTN8071c.JPG] Amethyst from Biedell Gulch, Colorado [./TNMix807and1107/AmethTN8071d.JPG]


No. AMETH TN 8071 - SOLD

Amethyst

Locality: Biedell Gulch, Colorado

Specimen Size: 2.5 x 2.2 x 1.3 cm (thumbnail)


This was not a particularly well known or large find, but I remember when these pieces hit the market years ago. This is honestly the best thumbnail from this find that I have seen, although there may be others. The Amethyst crystal is pristine with a light lilac color and razor sharp faces aesthetically flaring off matrix. If you're a Colorado collector, this would make a great addition to any collection for the unique locality.



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(click on highlighted picture to enlarge)

Olmiite from N'Chwaning I mine, Kalahari Manganese Fields, Northern Cape Province, South Africa [./TNMix807and1107/PoldTN8071l.JPG] Olmiite from N'Chwaning I mine, Kalahari Manganese Fields, Northern Cape Province, South Africa [./TNMix807and1107/PoldTN8071k.JPG] Olmiite from N'Chwaning I mine, Kalahari Manganese Fields, Northern Cape Province, South Africa [./TNMix807and1107/PoldTN8071e.JPG]


No. Pold TN 8071 - $ 1200.00

Olmiite

Locality: N'Chwaning I mine, Kalahari Manganese Fields, Northern Cape Province, South Africa

Specimen Size: 3.0 x 2.1 x 1.5 cm (thumbnail)


From the significant find from around 2001, this piece is one of the best thumbnail size specimens of this amazing material that I have seen. Before this discovery, Olmiite was often known as opaque, cream-colored aggregates, and the new discovery yielded incredibly gemmy, rich orange-red color specimens. This full-size thumbnail specimen features a remarkably rich orange-red color, gemmy, lustrous, spherical aggregate associated with a smaller peach-colored aggregate of equal quality on matrix. The piece displays very well, and truly is as fine of quality as I have seen for the species. It seems as though these specimens have disappeared from the market rather quickly, and after my recent trips to Munich and Tucson, this piece is very competitively priced compared to many inferior specimens that were available for sale at the show.

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Microcline (var: Microcline (var: Microcline (var:


No. AMAZ TN 8076 - SOLD

Microcline (var: "Amazonite")

Locality: Qui-Buc No. 1 Claim, Park County, Colorado

Specimen Size: 2.8 x 2.2 x 1.6 cm (thumbnail)


Simply put, the finest Amazonite crystals in the world are found in around the Pike's Peak Batholith. The area has continued to produce fine quality crystals for the better part of a century. Here we have a wonderful cluster of prismatic, blue green color Amazonite crystals which are complete on all sides. It was found in the 1990's at the well known Qui-Buc Claims which produced some very good quality Amazonites for a short time. A lovely thumbnail of this well known material.



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Galena from Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado. [./TNMix807and1107/GalTN8072h.JPG] Galena from Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado. [./TNMix807and1107/GalTN8072f.JPG]


No. Gal TN 8072 - $ 75.00

Galena

Locality: Black Cloud Mine, Iowa Gulch, Leadville, Lake County, Colorado.

Specimen Size: 2.6 x 1.8 x 1.6 cm (thumbnail)


A wonderful old classic Galena with attractive cuboctahedral form. I think it is interesting to see the selectivity of the modifications as they do not occur on every corner of the cube, but actually alternate from corner to corner. It is amazing to think how many Leadville specimens were on the market as recently as 10 years ago (my father literally had thousands of them), and now they are becoming increasingly difficult to obtain. This piece would fit very well into a Leadville suite, a worldwide Galena collection, or any thumbnail collection.

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Copper from Chino Mine, Santa Rita, Santa Rita District, Grant Co., New Mexico [./TNMix807and1107/CuNMTN8071a.JPG] Copper from Chino Mine, Santa Rita, Santa Rita District, Grant Co., New Mexico [./TNMix807and1107/CuNMTN8071d.JPG]


No. CU NM TN 8071 - $ 140.00 SOLD

Copper

Locality: Chino Mine, Santa Rita, Santa Rita District, Grant Co., New Mexico

Specimen Size: 2.4 x 2.4 x 1.4 cm (thumbnail)


A very dramatic and bright Copper crystal group featuring multi-layered Spinel-law twinning and small dodecahedral crystals in between the arborescent "branches". It appears that somebody decided to brighten this piece up and remove the natural patina. Nonetheless, it is a highly aesthetic specimen and completely crystallized all the way around. With so many Chino pieces that have come out in recent years, I think this one truly stands out due to its obvious visual appeal.



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(click on highlighted pictures to enlarge)

Epidote (pseudo hexagonal) from Northern Frontier District, Kenya [./TNMix807and1107/EpiKenTn8071a.JPG] Epidote (pseudo hexagonal) from Northern Frontier District, Kenya [./TNMix807and1107/EpiKenTn8071g.JPG] Epidote (pseudo hexagonal) from Northern Frontier District, Kenya [./TNMix807and1107/EpiKenTn8071f.JPG] Epidote (pseudo hexagonal) from Northern Frontier District, Kenya [./TNMix807and1107/EpiKenTn8071h.JPG]


No. Epi Ken TN 8071 - $ 265.00

Epidote (pseudo hexagonal)

Locality: Northern Frontier District, Kenya

Specimen Size: 2.9 x 1.6 x 0.9 cm (thumbnail)


These Kenyan Epidotes started showing up on the market around 2002, and they almost disappeared as quickly as they arrived. They are superb quality crystals from any locality, but definitely attracted more attention because they came from Kenya. Even though many of the crystals from this find were very good sized, not all of them were the finest quality. This piece is one of the best quality crystals I've seen from this find from the standpoint of sharpness and luster. The main crystal has a very interesting pseudo hexagonal termination like a Tourmaline, which is very unusual in my experience. When the piece is strongly backlit, you can see a small zone of the deepest, richest vanadium green color possible for an Epidote. Epidote is one of my favorite minerals, and if you're a fan of these specimens, I think this piece is a great buy for the size and quality.

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Cafarsite from Wannigletscher, Scherbadung, (Cervandone on the Italian side), Kriegalp Valley, Binntal, Kanton Wallis (Valais), Switzerland [./TNMix807and1107/CafSuiTN8071j.jpg] Cafarsite from Wannigletscher, Scherbadung, (Cervandone on the Italian side), Kriegalp Valley, Binntal, Kanton Wallis (Valais), Switzerland [./TNMix807and1107/CafSuiTN8071e.JPG] Cafarsite from Wannigletscher, Scherbadung, (Cervandone on the Italian side), Kriegalp Valley, Binntal, Kanton Wallis (Valais), Switzerland [./TNMix807and1107/CafSuiTN8071d.JPG]


No. CAF SUI TN 8071 - SOLD

Cafarsite

Locality: Wannigletscher, Scherbadung, (Cervandone on the Italian side), Kriegalp Valley, Binntal, Kanton Wallis (Valais), Switzerland

Specimen Size: 2.5 x 2.1 x 1.7 cm (thumbnail)
Cafarsite crystal: 1.5 cm.


One of the holy grails of Alpine minerals ! As many of you know I'm a huge fan of Alpine and "Alpine-type" minerals along with being a huge fan of "black" minerals, so this species is a great combination of two of my passions. For years, I have searched for a superb Cafarsite specimen (of ANY size) from the Alps, but they are few and far between, even in mediocre specimens. This species, like a few other Arsenides found in this region (i.e., Asbecasite, Fetiasite) gets its name from this chemical composition. This species is only found at few localities worldwide, all but one of them being in the Swiss and Italian Alps. This particular piece is a highly aesthetic and impressive thumbnail of Cafarsite featuring a complete, isolated, relatively large, sharp, cuboctahedron sitting on a bit of Alpine granite matrix. I would say there are only a handful of DECENT Cafarsites found each year at Scherbadung, and it seems like all Alpine specimens, the pieces from Switzerland command a higher price across the board than their Italian, Austrian and French counterparts. If you're a serious collector, this is a big deal from the standpoint of rarity, crystal size, and aesthetics from such a prominent locality.



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Microcline (var: Microcline (var:


No. AMAZ ETH TN 8071 - $ 45.00 - ON HOLD

Microcline (var: "Amazonite")

Locality: Konso Region, Sidamo Province, Ethiopia

Specimen Size: 2.6 x 2.0 x 1.7 cm (thumbnail)


Fine Amazonite crystals are only known from a few world localities, but recently Ethiopia has added its name to the ranks of some of the best specimens around. The color of this crystal is just about as rich and dark as you'll find in an Amazonite from any locality. It is certainly darker than about 95% of the Amazonite found in Colorado. The crystal is complete all the way around with rather lustrous faces and a bladed crystal group of Albite (var: "Cleavelandite") on the side. The crystal is also translucent (almost gemmy) around the edges as well. If this crystal were from Colorado, you can be sure that the price could be two to three times higher.



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Anorthite (var:


No. LAB TN 8071 - $ 65.00 SOLD

Anorthite (var: "Labradorite") (var: "Sunstone")

Locality: Dust Devil mine, Plush, Lake County, Oregon

Specimen Size: 2.4 x 1.0 x 0.6 cm (thumbnail)


The Dust Devil mine is best known for producing amazing gem quality Sunstone occurring in a beautiful range of colors. I have been told that this material is Labradorite, which is one of the intermediate members of the Albite-Anorthite Plagioclase Feldspar series. The large percentage of the material from Oregon is found as broken crystal shards and typically has a light "champagne" hue. Euhedral crystals of this material are very rare in my experience. I actually pulled this piece from a parcel of gem rough, saving it from the gruesome fate of being forever destroyed for the sake of cutting a gem. It is not a complete crystal, but it does show good crystal form with defined striations on the "b" faces of the crystal. It is nearly 100% gem quality, and would make a great addition to any Feldspar suite, a collection of gem crystals (especially U.S. gem crystals), or any thumbnail collection.

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