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
Irregular/uneven, Brittle, Metallic
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {10bar10}
{110} good, 100 moderate, parting on {092} and {011}
1.7 Mohs Hardness
1.8 Chemical Composition
Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)