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Sillimanite
Sillimanite

Datolite
Datolite



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Sillimanite
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Datolite

Sillimanite and Datolite 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)
 
Brittle
-
-
2.90-3.00
Conchoidal, Uneven
None
5-5.5
CaBSiO 4(OH)Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Sillimanite and Datolite Chemical Formula

While comparing Sillimanite and Datolite 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 Datolite chemical formula.

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Sillimanite and Datolite Specific Gravity

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