Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.633.16-3.23
1
7.18
👆🏻
Fracture
Uneven
Conchoidal, Uneven, Conchoidal to uneven
Cleavage
{001} Perfect, {010} Good
[0001] indistinct, [1010] indistinct
Mohs Hardness
6-6.55
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Arthur Thomas , Gemstones (2009)
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references