Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.942.45-2.50
1
7.18
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Fracture
Conchoidal, Uneven
Conchoidal
Cleavage
{010} Good, {100} Distinct
Poor on {110}
Mohs Hardness
5-5.55.5-6
2
10
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Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
KAlSi 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references