Tenacity
Brittle
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
4.3-52.60-2.65
1
7.18
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Fracture
Irregular/uneven
Uneven, Conchoidal
Cleavage
Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
3-3.56-6.5
2
10
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Chemical Composition
BaSO4
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)