Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.60-2.644.00-4.62
1
7.18
👆🏻
Fracture
Uneven, Splintery, Conchoidal
Conchoidal, Uneven
Cleavage
Absent
Indistinct parting on [111]
Mohs Hardness
6.5-77.5-8
2
10
👆🏻
Chemical Composition
SiO 2Arthur Thomas , Gemstones (2009)
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)