Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.79-2.873.80-4.15
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
perfect along [010] and [100]
Mohs Hardness
5.5-63.5-4
2
10
👆🏻
Chemical Composition
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references