1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.5 Fracture
Conchoidal
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
2.6 Cleavage
No true cleavage
Perfect on {100}, imperfect on {001}
2.7 Mohs Hardness
2.11 Chemical Composition
Al 2 O 3
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)