Dioptase
Dioptaas, Dioptaasi, Dioptas, Dioptasa, Dioptasio, Dioptaz, Диоптаз, 綠銅礦
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
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Formula: Cu6[Si6O18].6H2O
Mineral class: silicates Crystal system: trigonal Mohs scale: 5 Density (g/cm3): 3.28 - 3.35 Refractive index: 1.644 - 1.709 Cleavage: perfect Colors: green, turquoise Luster: vitreous Fluorescence: - Pleochroism: slightly greenish Largest Dioptase: 5 cm (Tsumeb Mine / Namibia) Deposits: Chile, Namibia, Russia, USA, Zaire 1st Description: 1892 Name: a combination of the Greek words "dia" (through), and "optomai" (sight) |
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Dioptase Mineral
Size: 4.6 x 3.1 x 2.6 cm Origin: Kimbedi / Pool Region / Republic of the Congo Photo by kind permission of © www.irocks.com |
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Dioptase
Weight: 2.23 ct Origin: Kimbedi / Pool Region / Republic of the Congo Photo by kind permission of © www.irocks.com |
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Dioptase Mineral
Size: 3.5 x 2.3 x 1.8 cm Origin: Kaounga Renéville / Pool Region / Republic of the Congo Photo by kind permission of © www.earthstreas.com |
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