Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.55-2.702.98-3.10
1
7.18
👆🏻
Fracture
-
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
None
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
6.5-76
2
10
👆🏻
Chemical Composition
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references