Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
{110} Perfect, {???} Distinct, {???} Distinct
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
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