Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.71-2.723.95-4.10
1
7.18
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Fracture
Fibrous
Uneven
Cleavage
{???} Good
{110} Perfect, {110} Perfect, {110} Perfect
Mohs Hardness
6-6.53.5-4
2
10
👆🏻
Chemical Composition
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references