Tenacity
Brittle
Brittle
Solubility
Soluble
insoluble
Durability
-
-
Specific Gravity
4.3-56.86-7.03
1
7.18
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Fracture
Irregular/uneven
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
3-3.56-7
2
10
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Chemical Composition
BaSO4
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references