Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.79-2.873.43-3.44
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
None Observed
Mohs Hardness
5.5-66.5-7
2
10
👆🏻
Chemical Composition
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references