Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.79-2.873.05-3.08
1
7.18
👆🏻
Fracture
Conchoidal
Uneven, Irregular, Conchoidal
Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
None
Mohs Hardness
5.5-66.5
2
10
👆🏻
Chemical Composition
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 3Al 2(SiO 4) 3-x(OH) 4x (x=0.2 to 1.5)Anthony et al , Handbook of mineralogy (2001)