Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.66-2.865.00-5.30
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Indiscernible
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
7.5-86
2
10
👆🏻
Chemical Composition
Al 2Be 3Si 6O 18Martin H.
Fe 2O 3Arthur Thomas , Gemstones (2009)