Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.65-2.902.9
1
7.18
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Fracture
-
Fibrous
Cleavage
{001} Perfect
[010] Perfect, [100] Distinct, [011] Distinct
Mohs Hardness
-99992
2
10
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Chemical Composition
Al 2Si 4O 10(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Amethyst, Clear Quartz, Smoky Quartz, Cacoxenite, Rutile, Geothite, Lepidocrocite