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$153.00 Rhodochrosite 0.51 ct / South Africa $222.00 Bustamite (rare) 1.11 ct / South Africa $1,601.50 Ametrine (natural bi-color Quartz) 32.03 ct / Bolivia $514.35 Ametrine (natural bi-color Quartz) 11.43 ct / Bolivia $118.00 Ametrine (natural bi-color Quartz) 2.95 ct / Bolivia $148.80 Ametrine (natural bi-color Quartz) 3.72 ct / Bolivia $613.60 Citrine (natural color) 15.34 ct / Brazil $273.40 Gem Silica 13.67 ct / (Quartz / Chalcedony with Chrysocolla inclusions) / Peru $169.65 Hyalite Opal (Opal-AN) 2.61 ct / ("Blood Vessel Opal") / Mexico $219.75 Hyalite Opal (Opal-AN) 2.93 ct / ("Blood Vessel Opal") / Mexico $109.50 Opal (Cat's Eye) 2.19 ct / Brazil $75.50 Opal (Cat's Eye) 1.51 ct / Brazil $950.00 Spinel ("Ruby Spinel") twin on matrix / Locality - Mogok Township, Pyin-Oo-Lwin District, Mandalay Division, Myanmar (Burma) $300.00 Opal 1.00 ct / (with "Contra Luz" Color Flash) / Ethiopia $450.00 Halite (great color) (fluorescent!) / Locality - Rudna Mine, Lubin District, Legnica, Lower Silesia, Poland $4,000.00 Rhodochrosite on Gypsum (var: "Selenite") / Locality - Sunnyside Mine, Bonita Peak, Eureka District, San Juan County, Colorado $309.00 Rhodochrosite (Cat's Eye) 2.06 ct / Kazakhstan $91.25 Bixbyite 0.73 ct / Utah $100.00 Vivianite / Locality - Tomokoni adit, Canutillos Mine, Machacamarca District (Colavi District), Potosi Department, Bolivia $2,500.00 Petalite (rare color/rare matrix specimen) / Locality: Palelni mine ("Kat Chay mine"), Kyaukme District, Shan State, Myanmar (Burma)