Tenacity
Sectile
Brittle
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
3.075.00-5.20
1
7.18
👆🏻
Fracture
-
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
Perfect on {010}, indistinct on {100} and {102}
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
26-6.5
2
10
👆🏻
Chemical Composition
Ni3(AsO4)2•8(H2O)
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references