VOLKONSKOITE - RUSSIA (FROM TYPELOCALITY)
€ 25,00
Efimyatskaya Mt, Efimyata Village, Kama River, Okhansk, Permskaya Oblast, Russia.
Very rare volkonskoite with beautiful deep green color.
A chromium bearing species that is part of the smectite group of minerals with the interesting moleculformula: Ca0.3(Cr,Mg,Fe)2((Si,Al)4O10)(OH)2·4H2O