1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Gems, Sixth Edition (2006)
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
1.6 Cleavage
None
Perfect on {100}, imperfect on {001}
1.7 Mohs Hardness
1.8 Chemical Composition
SiO2 (with a high level of nickel impurities )
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)