Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.942.48
1
7.18
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Fracture
Conchoidal, Uneven
Uneven
Cleavage
{010} Good, {100} Distinct
Perfect on {001}
Mohs Hardness
5-5.52
2
10
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Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
NaCa16Si23AlO60(OH)8•64(H2O)