Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.71-2.722.98-3.10
1
7.18
👆🏻
Fracture
Fibrous
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
{???} Good
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
6-6.56
2
10
👆🏻
Chemical Composition
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references