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Sillimanite
Sillimanite

Marcasite
Marcasite



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Sillimanite
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Marcasite

Sillimanite and Marcasite 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)
 
-
-
-
4.80-4.90
Uneven
{010} Indistinct
6-6.5
FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Sillimanite and Marcasite Chemical Formula

While comparing Sillimanite and Marcasite 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 Marcasite chemical formula.

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Sillimanite and Marcasite Specific Gravity

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