Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.7-3.93.85-3.94
1
7.18
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Fracture
Conchoidal
Conchoidal, Uneven
Cleavage
{001} perfect; {111} imperfect, may exhibit parting on , {011}
{010} Good, {100} Distinct
Mohs Hardness
5.5-65-5.5
2
10
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Chemical Composition
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)