Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.50-5.902.9-3.5
1
7.18
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Fracture
Conchoidal
Conchoidal
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
45.5-6
2
10
👆🏻
Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)