COLLINSITE (Ca2(Mg,Fe)(PO4)2.2(H2O))
Class: phosphate
Rarity: Very Rare Crystal:  crystal with a unknown habit 
Colour: brown;   Lustre: silky;   Fracture: unknown;  
Hardness - between 3 and: 3.5;   Density - between 2.95 and: 2.95
Dana number: 720

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