1 Physical Properties
1.1 Tenacity
1.2 Solubility
Partially soluble in water
insoluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Not Available
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular
1.6 Cleavage
Perfect on {10 1 0}
{100} imperfect, {110} indistinct; partings on {111} or {011}
1.7 Mohs Hardness
1.8 Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references