Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.26-3.413.69-3.81
1
7.18
👆🏻
Fracture
Fibrous, ConchoidalWalter Schumann
Uneven, Conchoidal to uneven, ConchoidalWalter Schumann
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Distinct on {110}, imperfect on {010}, poor on {001}
Mohs Hardness
7-8.58.5
2
10
👆🏻
Chemical Composition
AlAl6O3BSi3O18
BeAl 2 O 4