Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.34-2.512.60-2.64
1
7.18
👆🏻
Fracture
-
Uneven, Splintery, Conchoidal
Cleavage
None
Absent
Mohs Hardness
-99996.5-7
2
10
👆🏻
Chemical Composition
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O
SiO 2Arthur Thomas , Gemstones (2009)