Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
3.10-3.203.95-4.10
1
7.18
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Fracture
Uneven, Conchoidal
Uneven
Cleavage
Poor to good on (001)
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
6-6.53.5-4
2
10
👆🏻
Chemical Composition
(Mg,Fe) 5(SiO 4) 2(F,OH) 2Ulrich Henn and Claudio C.
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references