Tenacity
Brittle
-
Solubility
insoluble in water
-
Durability
-
-
Specific Gravity
5.00-5.202.25-2.40
1
7.18
👆🏻
Fracture
Uneven, Conchoidal, ConchoidalWalter Schumann
-
Cleavage
Indistinct on {001}; partings on {011} and {111}
perfect on {010}; good on {100}
Mohs Hardness
6-6.55-5.5
2
10
👆🏻
Chemical Composition
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references