Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.64-2.693.95-4.10
1
7.18
👆🏻
Fracture
-
-
Cleavage
None
None
Mohs Hardness
79
2
10
👆🏻
Chemical Composition
SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2O 3Ulrich Henn and Claudio C.