Tenacity
-
Brittle
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
2.555.00-5.20
1
7.18
👆🏻
Fracture
-
Uneven, Conchoidal, ConchoidalWalter Schumann
Cleavage
{001} Perfect
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
-99996-6.5
2
10
👆🏻
Chemical Composition
Mg 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references