Tenacity
Brittle
-
Solubility
Soluble
-
Durability
-
-
Specific Gravity
4.3-52.24-2.29
1
7.18
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Fracture
Irregular/uneven
Uneven, Subconchoidal, Conchoidal
Cleavage
Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
Very poor [100]
Mohs Hardness
3-3.55-5.5
2
10
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Chemical Composition
BaSO4
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references