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Volkonskoite : Ca0.3(Cr,Mg,Fe)2(Si,Al)4O10(OH)2·4H2O | |
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Fortullino, Rosignano Marittimo, Livorno Province, Tuscany, Italy Field of view: 13 mm Photo and collection Antonio Borrelli |
| © Antonio Borrelli | Photo ID: 47983 View Count: 365 |
Volkonskoite : Ca0.3(Cr,Mg,Fe)2(Si,Al)4O10(OH)2·4H2O | |
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Fortullino, Rosignano Marittimo, Livorno Province, Tuscany, Italy 3.9 mm wide aggregate of slightly greenish-gray volkonskoite - one of 2 (by shuiskite) known Cr-rich Ca silicates, the third Cr-rich phyllosilicate by chromceladonite and chromphyllite and possibly the second (by chromceladonite?) Cr-rich clay mineral. Jarek Skupniewski (Paleonet) specimen - thanks! |
| © Ł Kruszewski 08 | Photo ID: 191108 View Count: 75 |
Volkonskoite : Ca0.3(Cr,Mg,Fe)2(Si,Al)4O10(OH)2·4H2O, Corundum (Var: Ruby) : Al2O3 | |
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Kleggåsen Ruby Quarry, Froland, Aust-Agder, Norway Green Volkonskoite rimming a ruby crystal from Kleggåsen, Froland, Aust-Agder, Norway. Field of view: 2 cm. Specimen and photo: Knut Eldjarn. |
| © Knut Eldjarn | Photo ID: 53738 View Count: 621 |
Volkonskoite : Ca0.3(Cr,Mg,Fe)2(Si,Al)4O10(OH)2·4H2O | |
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Efimyatskaya Mt, Efimyaty Village, Kama River, Okhansk, Permskaya Oblast', Middle Urals, Urals Region, Russia 1.3 x 1 cm specimen of volkonskoite - a chromium bearing species that is part of the smectite group of minerals. |
| © 1995-2001 Trinity | Photo ID: 18626 View Count: 630 |
Volkonskoite : Ca0.3(Cr,Mg,Fe)2(Si,Al)4O10(OH)2·4H2O | |
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Efimyatskaya Mt, Efimyaty Village, Kama River, Okhansk, Permskaya Oblast', Middle Urals, Urals Region, Russia size 3,5x4cm Paul Bongaerts specimen and photograph |
| © Paul Bongaerts | Photo ID: 24210 View Count: 370 |
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