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
22.50-2.80
1
7.18
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Fracture
Uneven
-
Cleavage
Prismatic {10 1 0}, perfect
Perfect
Mohs Hardness
2-2.55-6.5
2
10
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Chemical Composition
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 4(Al,Si) 12O 24Cl to Ca 4(Si,Al) 12O 24(CO 3,SO 4)Arthur Thomas , Gemstones (2009)