Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.43-3.442.79-2.87
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
None Observed
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Mohs Hardness
6.5-75.5-6
2
10
👆🏻
Chemical Composition
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references