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
23.1-3.5
1
7.18
👆🏻
Fracture
Uneven
Granular
Cleavage
Prismatic {10 1 0}, perfect
None
Mohs Hardness
2-2.55-6
2
10
👆🏻
Chemical Composition
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)