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Sugilite
Sugilite

Sillimanite
Sillimanite



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Sugilite
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Sillimanite

Sugilite and Sillimanite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.69-2.79
Conchoidal
Poor on {0001}
5.5-6.5
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)

Sugilite and Sillimanite Chemical Formula

While comparing Sugilite and Sillimanite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Sugilite and Sillimanite chemical formula.

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Sugilite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sugilite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sugilite Vs Sillimanite during the identification of gemstone. Specific gravity of Sugilite is whereas that of Sillimanite is .