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Sillimanite
Sillimanite

Brucite
Brucite



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Sillimanite
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Brucite

Sillimanite and Brucite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Tough
-
-
3.20-3.26
Splintery
{010} perfect
6-7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth Edition (2006)
 
Sectile
-
-
2.39
Irregular
Perfect on {0001}
2.5
Mg(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Sillimanite and Brucite Chemical Formula

While comparing Sillimanite and Brucite 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 Sillimanite and Brucite chemical formula.

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Sillimanite and Brucite Specific Gravity

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