Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.66-2.865.9-6.3
1
7.18
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Fracture
ConchoidalWalter Schumann
Conchoidal, Uneven
Cleavage
Indiscernible
On {101}, distinct; on {112}, interrupted; on {001}, indistinct
Mohs Hardness
7.5-84.5-5
2
10
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Chemical Composition
Al 2Be 3Si 6O 18Martin H.
CaWO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references