Tenacity
Slightly sectile
-
Solubility
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
-
Durability
-
-
Specific Gravity
23-3.15
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
Prismatic {10 1 0}, perfect
Good on [110] and on [001]
Mohs Hardness
2-2.56.0-6.5
2
10
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Chemical Composition
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
[ ]Na2(Mg3Al2)Si8O22(OH)2