Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.16-3.233-3.15
1
7.18
👆🏻
Fracture
Conchoidal, Uneven, Conchoidal to uneven
Conchoidal
Cleavage
[0001] indistinct, [1010] indistinct
Good on [110] and on [001]
Mohs Hardness
56.0-6.5
2
10
👆🏻
Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
[ ]Na2(Mg3Al2)Si8O22(OH)2