Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.33-2.374.95-5.0
1
7.18
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Fracture
ConchoidalWalter Schumann
Uneven
Cleavage
Perfect on {010}, good on {100}
Imperfect to indistinct on {10 1 0}, parting on {0001}
Mohs Hardness
7.54-5
2
10
👆🏻
Chemical Composition
Be 2BO 3(OH)Ulrich Henn and Claudio C.
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references