Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Subconchoidal, Uneven, Conchoidal
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Perfect on {001}, good on {210}, poor on {010}
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references