2 Physical Properties
2.2 Tenacity
Not Available
Not Available
2.4 Solubility
Not Available
Not Available
2.5 Durability
Not Available
Not Available
2.8 Specific Gravity
3.05-3.083.80-4.15
1
7.18
2.9 Fracture
Subconchoidal, Uneven, Conchoidal, Uneven
Uneven, UnevenArthur Thomas, Gemstones (2009)
2.11 Cleavage
Poor on {100}
perfect along [010] and [100]
2.12 Mohs Hardness
2.15 Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references