1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
None, parting may develop along {111}
[001] good, [210] distinct
1.7 Mohs Hardness
1.8 Chemical Composition
Fe++Cr2O4
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references