1 Physical Properties
1.1 Tenacity
1.2 Solubility
insoluble
insoluble in water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
Not Available5.00-5.20
1
7.18
1.5 Fracture
(e.g. graphite).
Uneven, Conchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
1.6 Cleavage
{???} Imperfect, {???} Imperfect
Indistinct on {001}; partings on {011} and {111}
1.7 Mohs Hardness
1.8 Chemical Composition
Not Available
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references