Richterite
Richteriet, Richterit, Richterita, Рихтерит, リヒター閃石, 鹼鎂閃石
Commonly known
rarer (so called collectors stones)
very rare (rarities)
relatively rare organic material
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Formulas:
Richterite: Na[Ca,Na][Mg5][(OH)2|Si8O22] Ferrorichterite: Na2Ca(Mg,Fe2+)5Si8O22(OH)2 Potassic Richterite: (K,Na)(Ca,Na)2(Mg,Mn2+,Fe2+)5[(F,OH)|Si4O11]2 Fluororichterite: (K,Na)(Ca,Na)2(Mg,Fe3+,Fe2+)5[(F,OH,O)|(Si,Al)Si3O11]2 Potassic-fluororichterite: (K,Na)(Ca,Na)2(Mg,Mn2+,Ti4+)5[(F,OH)|(Si,Ti4+)Si3O11]2 Richterite and its varieties belong to the complicated mineral group "amphiboles" in which chains of silicates are held together by various metal ions like Na, K, Ca, Mg, Li, Al, Fe, Ti, or Mn. Mineral class: silicates Crystal system: monoclinic Mohs scale: 5 - 6 Density (g/cm3): 2.9 - 3.3 Refractive index: 1.615 - 1.636 Cleavage: different Colors: colorless, grey, yellowish, red, brown, green, blue, black Transparency: transparent - opaque Luster: vitreous Fluorescence: - Pleochroism: - Largest crystal: ? Deposits: worldwide Name: in honor of the German mineralogist Theodor Richter (1824 - 1898) |
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Richterite Mineral
Size: 2.85 x 0.83 x 0.36 cm Origin: Afghanistan Photo by kind permission of © Darlene Cobler |
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Richterite
Size: 0.8 x 0.6 cm Weight: 1.06 ct Origin: Afghanistan Photo by kind permission of © www.kox-gems.com |
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Richterite Mineral
Size: 2.7 x 0.6 x 0.2 cm Origin: Koksha Valley / Badakhshan Prov. / Afghanistan Photo by kind permission of © www.irocks.com |
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Richterite
Size: 0.72 x 0.48 cm Weight: 0.43 ct Origin: Afghanistan Photo by kind permission of © www.thegemtrader.com |
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Richterite Mineral
Size: 3.0 x 1.7 x 0.7 cm Origin: Shalman Mine / Zagi Mts. / Mulla Ghori / Khyber-Agency / Pakistan Photo by kind permission of © www.crystal-treasure.com |
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Richterite Mineral
Size: 1.6 x 1.2 x 0.6 cm Origin: Badakhshan Prov. / Afghanistan Photo by kind permission of © www.irocks.com |
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Richterite Mineral
Size: 2.5 x 2.5 x 1.0 cm Origin: Kiran / Koksha Valley / Badakhshan Prov. / Afghanistan Photo by kind permission of © www.freilichminerals.com |
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Richterite Mineral
Size: 6.4 x 4.09 x 2.25 cm Origin: South Africa Photo by kind permission of © Darlene Cobler |
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Richterite Mineral
Image width: appr. 20 cm Origin: Lebrija / Utrera / Sevilla Prov. / Spain Photo ©: Carlos Pareja; Peter Seroka Collection; by kind permission of © Peter Seroka |
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Richterite Mineral
Size: 2.5 x 2.3 x 1.2 cm Weight: 77 ct Origin: Wessels Mine / Hotazel / Northern Cape Province / South Africa Photo by kind permission of © JewelsRoughGems |
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Richterite
Size: 1.2 x 1.1 x 0.7 cm Weight: 7.04 ct Origin: Wessels Mine / Hotazel / Northern Cape Prov. / South Africa Photo by kind permission of © JewelsRoughGems |
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Richterite with Sugilite
Size: 1.0 x 0.6 x 0.5 cm Weight: 2.49 ct Origin: Wessels Mine / Hotazel / Northern Cape Province / South Africa Photo by kind permission of © JewelsRoughGems |
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Richterite Mineral
Image width: 0.75 cm Origin: Laacher See Lake / Eifel Mts. / Germany Photo by kind permission of © Stephan Wolfsried |
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