Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
[001] perfect; [100] distinct
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)
Sub-Conchoidal, Splintery
{201} Imperfect, {100} Poor, {001} Poor