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
Uneven, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {001}
perfect along [010] and [100]
1.7 Mohs Hardness
1.8 Chemical Composition
Ca(Mg,Al)3(Al3Si)O10(OH)2
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references