Tenacity
Brittle
Brittle
Solubility
Soluble
-
Durability
-
-
Specific Gravity
4.3-52.72-2.75
1
7.18
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Fracture
Irregular/uneven
Uneven
Cleavage
Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
Perfect on [001], good on [010], imperfect on [110]
Mohs Hardness
3-3.56-6.5
2
10
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Chemical Composition
BaSO4
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)