Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.16-3.233.69-3.81
1
7.18
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Fracture
Conchoidal, Uneven, Conchoidal to uneven
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Cleavage
[0001] indistinct, [1010] indistinct
Distinct on {110}, imperfect on {010}, poor on {001}
Mohs Hardness
58.5
2
10
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Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
BeAl 2 O 4