Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Partially soluble in water
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
{110} good, 100 moderate, parting on {092} and {011}
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)