Tenacity
Brittle
-
Solubility
insoluble in water
-
Durability
-
Hard
Specific Gravity
5.00-5.202.67-2.78
1
7.18
👆🏻
Fracture
Uneven, Conchoidal, ConchoidalWalter Schumann
Uneven, ConchoidalWalter Schumann
Cleavage
Indistinct on {001}; partings on {011} and {111}
Imperfect on the [0001]
Mohs Hardness
6-6.57.5-8
2
10
👆🏻
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Be3Al2SiO6