Tenacity
-
Brittle
Solubility
-
Dilute acid
Durability
-
-
Specific Gravity
3.85-3.942.93-2.96
1
7.18
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Fracture
Conchoidal, Uneven
Subconchoidal, Conchoidal
Cleavage
{010} Good, {100} Distinct
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
5-5.53.5-4
2
10
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Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references