Tenacity
BrittleWalter Schumann
-
Solubility
hot salt water
-
Durability
-
-
Specific Gravity
1.98-2.252.98-3.10
1
7.18
👆🏻
Fracture
Conchoidal
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
None
[100] Perfect, [110] Good, [011] Distinct
Mohs Hardness
5-6.56
2
10
👆🏻
Chemical Composition
SiO2 · nH2O
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references