Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.65-2.90-9999
1
7.18
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Fracture
-
-
Cleavage
{001} Perfect
None
Mohs Hardness
-99993-4
2
10
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Chemical Composition
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Celestite, Andalusite, Feldspar, Dolomite, Gypsum, Halloysite, Kaolinite, Montmorillonite, Sepiolite, Smectite, Vermiculite