1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Insoluble in acids
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
4.12-4.184.20-4.30
1
7.18
1.5 Fracture
ConchoidalArthur Thomas, Conchoidal, Brittle
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
{???} Distinct
{110} good, 100 moderate, parting on {092} and {011}
1.7 Mohs Hardness
1.8 Chemical Composition
Mn 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)