Epidote
Epidoot, Epidootti, Epidot, Epidota, Epidotas, Épidote, Epidoto, Епідот, 緑簾石, 紅綠寶石, אפידוט
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
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Formula: Ca2(Fe3+,Al)3(SiO4)3(OH)
Mineral class: silicates Crystal system: monoclinic Mohs scale: 6 - 7 Density (g/cm3): 3.39 - 3.49 Refractive index: 1.715 - 1.797 Cleavage: different Colors: yellow-green, dark green; reddish-brown, gold-brown Luster: vitreous - resinous Fluorescence: - Pleochroism: strong: colorless - yellow - green - brown Largest Epidote: 0.419 kg (source: www.mineralien-basel.ch), 35 cm? Deposits: worldwide 1st Description: 1892 Name: from the Greek word "epidosis" (increase) |
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Epidote Mineral
Size: 2.8 x 2.5 x 1 cm Origin: Bellecombe / Aosta Valley / Italy Photo by kind permission of © www.webmineralshop.com |
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Epidote
Weight: 0.89 ct Size: 0.69 x 0.55 cm Origin: Brazil Photo by kind permission of © www.gemfrance.com |
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Epidote Mineral
Origin: Lago Fallin / Val di Viu / Piemonte / Italy Photo by kind permission of © www.irocks.com |
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Formula Tawmawite (Chrome Epidote):
Ca2(Al,Fe3+,Cr)3[O/OH/SiO4/Si2O7]
Mineral class: silicates Crystal system: monoclinic Mohs scale: 6 - 7 Density (g/cm3): 3.45 ? Refractive index: 1.715 - 1.797 ? Colors: yellow, green, dark green Fluorescence: - Pleochroism: strong: green - light yellow Largest Tawmawite: ? Deposits: Austria, Finland, Italy, Myanmar, Pakistan, USA, Zimbabwe 1st Description: 1907 (Bleeck) |
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Tawmawite
Size: 4.1 x 4.1 x 2.2 cm Weight: 0.30 ct Origin: Pakistan Photo by kind permission of © www.djraregems.com |
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