Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.50-5.905.00-5.30
1
7.18
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Fracture
Conchoidal
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
None, may show partings on {0001} and {10 1 1}
Mohs Hardness
46
2
10
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Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
Fe 2O 3Arthur Thomas , Gemstones (2009)