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


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)

Richterite Mineral

Size: 2.85 x 0.83 x 0.36 cm

Origin: Afghanistan

Photo by kind permission of © Darlene Cobler
Richterite Mineral
Richterite

Size: 0.8 x 0.6 cm
Weight: 1.06 ct
Origin: Afghanistan

Photo by kind permission of © www.kox-gems.com

Richterite

Weight: 3.95 ct

Origin: Myanmar

Photo by kind permission of © www.djraregems.com

Richterite

Weight: 1.08 ct

Origin: Afghanistan

Photo by kind permission of © www.steveperrygems.com

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
Richterite Mineral
Richterite

Size: 0.72 x 0.48 cm
Weight: 0.43 ct
Origin: Afghanistan

Photo by kind permission of © www.thegemtrader.com

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
Richterite Mineral

Richterite Mineral

Size: 1.6 x 1.2 x 0.6 cm

Origin: Badakhshan Prov. / Afghanistan

Photo by kind permission of © www.irocks.com
Richterite Mineral

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
Richterite Mineral

Richterite Mineral

Size: 6.4 x 4.09 x 2.25 cm

Origin: South Africa

Photo by kind permission of © Darlene Cobler
Richterite Mineral

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
Richterite Mineral

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
Richterite Mineral
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
Richterite Mineral

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

Richterite Mineral

Image width: 0.75 cm

Origin: Laacher See Lake / Eifel Mts. / Germany

Photo by kind permission of © Stephan Wolfsried
Richterite Mineral


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