1 Physical Properties
1.1 Tenacity
Not Available
Slightly sectile
1.2 Solubility
Not Available
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Conchoidal, Brittle, Conchoidal
Uneven, Uneven, Gemstones (2009), Brittle
1.6 Cleavage
Good on [110] and on [001]
Prismatic {10 1 0}, perfect
1.7 Mohs Hardness
1.8 Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references