Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
5.50-5.903.87-4.14
1
7.18
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Fracture
Conchoidal
Subconchoidal, Conchoidal
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
Poor on {120}, in traces on {001}
Mohs Hardness
45.5-6
2
10
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Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references