Minerals

HOLDENITE ((Mn,Mg)6Zn3(AsO4)2(SiO4)(OH)8)
Class: phosphate
Rarity: Very Rare Crystal:  crystal with a unknown habit 
Colour: red;   Lustre: unknown;   Cleavage: in traces;   Fracture: unknown;  
Hardness - between 0 and: 10;   Density - between 0 and: 24
Dana number: 728




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