Tenacity
-
Sectile
Solubility
-
Soluble
Durability
-
-
Specific Gravity
3.1-3.26.13
1
7.18
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Fracture
-
Conchoidal
Cleavage
Vitreous, pearly on cleavage
Distinct on {001} and {110}, indistinct on {100}
Mohs Hardness
3-42-3
2
10
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Chemical Composition
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references