1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.05-3.083.20-3.25
1
7.18
1.7 Fracture
Subconchoidal, Uneven, Conchoidal, Uneven
Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Metallic
1.8 Cleavage
Poor on {100}
Good/distinct on [210]
1.9 Mohs Hardness
1.13 Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Mg 2Si 2O 6Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references