1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Brittle, Uneven, Brittle, Uneven
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
1.6 Cleavage
Perfect on {001}, imperfect on {110}
Perfect on {100}, imperfect on {001}
1.7 Mohs Hardness
1.8 Chemical Composition
(K,Na)Ca4Si8O20(F,OH)•8(H2O)
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)