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Sillimanite
Sillimanite

Orthoclase
Orthoclase



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Sillimanite
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Orthoclase

Sillimanite and Orthoclase 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)
 
-
-
-
2.54-2.61
Uneven
Has perfect cleavage on {001} and good cleavage on {010}. Cleavages intersect at 90°.
6
KAlSi 3O 8Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Sillimanite and Orthoclase Chemical Formula

While comparing Sillimanite and Orthoclase 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 Orthoclase chemical formula.

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Sillimanite and Orthoclase Specific Gravity

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