Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.20-3.252.9-3.5
1
7.18
👆🏻
Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
Good/distinct on [210]
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
5.55.5-6
2
10
👆🏻
Chemical Composition
Mg 2Si 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)