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
3.79-3.942
1
7.18
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Fracture
Lamellar, Splintery
Uneven
Cleavage
{100} Good, {001} Good, {010} Poor
Prismatic {10 1 0}, perfect
Mohs Hardness
42-2.5
2
10
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Chemical Composition
FeAs
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references