Tenacity
Brittle
-
Solubility
-
Insoluble in acids
Durability
-
-
Specific Gravity
3.69-3.814.20-4.30
1
7.18
👆🏻
Fracture
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Uneven, Conchoidal
Cleavage
Distinct on {110}, imperfect on {010}, poor on {001}
{110} good, 100 moderate, parting on {092} and {011}
Mohs Hardness
8.56-6.5
2
10
👆🏻
Chemical Composition
BeAl 2 O 4
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)