Tenacity
-
Sectile
Solubility
-
Soluble
Durability
-
-
Specific Gravity
5.05-5.226.13
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
None
Distinct on {001} and {110}, indistinct on {100}
Mohs Hardness
5.5-62-3
2
10
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Chemical Composition
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Pb 2(CO 3)Cl 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references