Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
4.00-4.622.97-3.03
1
7.18
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Fracture
Conchoidal, Uneven
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Indistinct parting on [111]
{001} Poor
Mohs Hardness
7.5-87
2
10
👆🏻
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references