Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
{???} Distinct, {???} Indistinct
3CaAl 2Si 2O 8 · CaCO 3Anthony et al , Handbook of mineralogy (2001)
Conchoidal, Splintery, Fibrous
Perfect on {010}, distinct on {100}
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)