Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.945.6-5.76
1
7.18
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Fracture
Conchoidal, Uneven
Uneven
Cleavage
{010} Good, {100} Distinct
[001] perfect; [100] distinct
Mohs Hardness
5-5.52.5-3
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)