Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Perfect on {100}, imperfect on {001}
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Subconchoidal, Conchoidal
Perfect on [001] and [011]
TiO 2Michael OâDonoghue , Gems, Sixth edition (2006) More from other references