Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.08-3.122.33-2.37
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
ConchoidalWalter Schumann
Cleavage
{010} Perfect
Perfect on {010}, good on {100}
Mohs Hardness
7.57.5
2
10
👆🏻
Chemical Composition
BeAlSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Be 2BO 3(OH)Ulrich Henn and Claudio C.