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
Brittle, Metallic, Brittle, Metallic
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
1.6 Cleavage
Perfect on {001}
Perfect on {011}, fair on {100}, poor on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
Ca(Mg,Al)3(Al3Si)O10(OH)2
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references