Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.90-4.002.72
1
7.18
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Fracture
Conchoidal
-
Cleavage
Perfect on {001}, good on {210}, poor on {010}
{110} Perfect, {010} Perfect
Mohs Hardness
3-3.55-6
2
10
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Chemical Composition
SrSO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)