Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.79-2.873.1-3.2
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Vitreous, pearly on cleavage
Mohs Hardness
5.5-63-4
2
10
👆🏻
Chemical Composition
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references