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Sillimanite
Sillimanite

Pollucite
Pollucite



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Sillimanite
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Pollucite

Sillimanite and Pollucite 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
Readily soluble in HF
-
2.86-2.94
Conchoidal, Uneven
None observed
6.5-7
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references

Sillimanite and Pollucite Chemical Formula

While comparing Sillimanite and Pollucite 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 Pollucite chemical formula.

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Sillimanite and Pollucite Specific Gravity

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