SPENCERITE (Zn4(PO4)2(OH)2.3(H2O))
Class: phosphate
Rarity: Very Rare Crystal:  crystal with a radiated habit 
Colour: white;   Lustre: unknown;   Cleavage: perfect imperfect;   Fracture: unknown;  
Hardness - between 2.7 and: 2.7;   Density - between 3.12 and: 3.12
Dana number: 728

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