1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
insoluble in water
1.3 Durability
Not Available
Not Available
1.2 Specific Gravity
1.14 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Uneven, Conchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
1.15 Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Indistinct on {001}; partings on {011} and {111}
1.16 Mohs Hardness
1.13 Chemical Composition
(Ca,Na) 2Ta 2O 6(O,OH,F)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references