Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.33-2.373.23-3.26
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
Conchoidal
Cleavage
Perfect on {010}, good on {100}
Perfect on {010} imperfect on {100}
Mohs Hardness
7.56.5-7
2
10
👆🏻
Chemical Composition
Be 2BO 3(OH)Ulrich Henn and Claudio C.
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)