Simpsonite
Simpsoniet, Simpsonit, Simpsonita, Симпсонит, ｼﾝﾌﾟｿﾝ石, 鉭鋁石
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
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Formula: Al4(Ta,Nb)3(O,OH,F)14
Mineral class: oxides Crystal system: trigonal Mohs scale: 7 - 7.5 Density (g/cm3): 6.7 - 6.8 Refractive index: 1.976 - 2.045 Cleavage: - Colors: colorless, white, yellowish, brownish Luster: adamantine Fluorescence: SW: blue-white, sometimes yellowish Pleochroism: - Largest Simpsonite: 2.4 cm? Deposits: Australia, Brazil, Kazakhstan, Russia, Zaire, Zimbabwe Discovery: 1938 1st Description: 1944 Name: in honor of the Australian mineralogist Edward Sydney Simpson (1875 - 1939) |
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Simpsonite Mineral
Origin: Alto do Giz Pegmatite / Equador / Rio Grande do Norte / Brazil Photo by kind permission of © www.irocks.com |
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Simpsonite Mineral
Size: 1.6 x 1.5 x 1.2 cm Origin: Alto do Giz Pegmatite / Equador / Rio Grande do Norte / Brazil Photo by kind permission of © www.irocks.com |
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