Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.54-2.613.69-3.81
1
7.18
👆🏻
Fracture
Uneven
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Cleavage
{001} Perfect, {010} Good
Distinct on {110}, imperfect on {010}, poor on {001}
Mohs Hardness
68.5
2
10
👆🏻
Chemical Composition
KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
BeAl 2 O 4