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Todorokite, Opal, Magnesite


Todorokite : (Mn,Mg,Ca,Ba,K,Na)2Mn3O12·3H2O, Opal : SiO2·nH2O, Magnesite : MgCO3

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Locality: Bettolino, Baldissero Canavese, Canavese District, Torino Province, Piedmont, Italy
Black Todorokite into white opal with yellowish magnesite. Specimen size: 6x6x2 cm. Self collected 1981. Photo and collection Alessandro Cantamessa (#82).

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