Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
-99992.71-2.72
1
7.18
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Fracture
-
Fibrous
Cleavage
None
{???} Good
Mohs Hardness
3-46-6.5
2
10
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Chemical Composition
Celestite, Andalusite, Feldspar, Dolomite, Gypsum, Halloysite, Kaolinite, Montmorillonite, Sepiolite, Smectite, Vermiculite
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)