Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.72-2.756.30-6.39
1
7.18
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Fracture
Uneven
Conchoidal
Cleavage
Perfect on [001], good on [010], imperfect on [110]
[001] good, [210] distinct
Mohs Hardness
6-6.53-3.5
2
10
👆🏻
Chemical Composition
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references