Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.34-2.512.79-2.87
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
None
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Mohs Hardness
-99995.5-6
2
10
👆🏻
Chemical Composition
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references