1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Insoluble in acids
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Brittle, Metallic, Brittle, Metallic
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {001}
{110} good, 100 moderate, parting on {092} and {011}
1.7 Mohs Hardness
1.8 Chemical Composition
Ca(Mg,Al)3(Al3Si)O10(OH)2
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)