Tenacity
Brittle
Brittle
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
2.79-2.875.00-5.20
1
7.18
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Fracture
Conchoidal
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
5.5-66-6.5
2
10
👆🏻
Chemical Composition
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references