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
2.08-2.162
1
7.18
👆🏻
Fracture
Irregular/uneven
Uneven
Cleavage
distinct/good on {1011}
Prismatic {10 1 0}, perfect
Mohs Hardness
4.52-2.5
2
10
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Chemical Composition
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references