Tenacity
Sectile
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.075.00-5.30
1
7.18
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Fracture
-
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
Perfect on {010}, indistinct on {100} and {102}
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
26
2
10
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Chemical Composition
Ni3(AsO4)2•8(H2O)
Fe 2O 3Arthur Thomas , Gemstones (2009)