Tenacity
-
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
3.16-3.236.86-7.03
1
7.18
👆🏻
Fracture
Conchoidal, Uneven, Conchoidal to uneven
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
[0001] indistinct, [1010] indistinct
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
56-7
2
10
👆🏻
Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references