Physical Properties
Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.642.60-2.65
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Conchoidal
Cleavage
Indiscernible
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
6.5-76-6.5
2
10
👆🏻
Chemical Composition
SiO2
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)