1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Brittle, Uneven
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
1.6 Cleavage
{???} Distinct
Perfect on {001}, very good on {010}, imperfect on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
Mn2+5(PO 4) 2(PO 3OH) 2 · 4H 2O)Michael OâDonoghue , Gems, Sixth Edition (2006)
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)