Formula : Ca2(Mg,Fe)(PO4) * 2 H2O
System: triclinic Hardness:3½ Rarity:rare
Strunz id:VII/C.17-10 -
7 : Phosphates, Arsenates, Vanadates
Name origin: For Canadian geologist William Henry Collins (1878-1937), former Director, Geological Survey of Canada
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