Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
[001] good, [210] distinct
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references