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Sillimanite
Sillimanite

Povondraite
Povondraite



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Sillimanite
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Povondraite

Sillimanite and Povondraite 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)
 
-
-
-
3.26
Uneven
None
-9999
NaFe3+3Fe3+6(BO 3) 3Si 6O 18(O,OH) 4Anthony et al , Handbook of Mineralogy (2001)

Sillimanite and Povondraite Chemical Formula

While comparing Sillimanite and Povondraite 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 Povondraite chemical formula.

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Sillimanite and Povondraite Specific Gravity

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