1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Insoluble in acids
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Conchoidal, Conchoidal to uneven, Brittle
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
On {10 1 1} perfect; parting on {10 1 2}
{110} good, 100 moderate, parting on {092} and {011}
1.7 Mohs Hardness
1.8 Chemical Composition
MnCO3
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)