Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
4.00-4.622.60-2.65
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven, Conchoidal
Cleavage
Indistinct parting on [111]
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
7.5-86-6.5
2
10
👆🏻
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)