Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.58-2.803.87-4.14
1
7.18
👆🏻
Fracture
Uneven, Irregular
Subconchoidal, Conchoidal
Cleavage
Perfect
Poor on {120}, in traces on {001}
Mohs Hardness
5.55.5-6
2
10
👆🏻
Chemical Composition
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references