1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Decomposed by acids
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.5 Fracture
Not Available
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
2.6 Cleavage
Perfect on {010}
Perfect on {100}, imperfect on {001}
2.7 Mohs Hardness
2.11 Chemical Composition
(K,Na)3Cu20Al3Si29O76(OH)16•~8(H2O)
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)