Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.33-2.372.90-3.02
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
Subconchoidal, Conchoidal
Cleavage
Perfect on {010}, good on {100}
Indistinct on {110}
Mohs Hardness
7.55-5.5
2
10
👆🏻
Chemical Composition
Be 2BO 3(OH)Ulrich Henn and Claudio C.
CaBePO 4(F,OH)Ulrich Henn and Claudio C.