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
3.05-3.084.20-4.30
1
7.18
1.5 Fracture
Subconchoidal, Uneven, Conchoidal, Uneven
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Poor on {100}
{110} good, 100 moderate, parting on {092} and {011}
1.7 Mohs Hardness
1.8 Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)