Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.254.76-5.03
1
7.18
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Fracture
-
Conchoidal
Cleavage
Imperfect in one direction
None
Mohs Hardness
5-5.55.5-6.5
2
10
👆🏻
Chemical Composition
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)