Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
4.00-4.623.43-3.44
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
-
Cleavage
Indistinct parting on [111]
None Observed
Mohs Hardness
7.5-86.5-7
2
10
👆🏻
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references