Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Prismatic {10 1 0}, perfect
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)