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Marcasite
Marcasite

Biotite
Biotite



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Marcasite
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Biotite

Marcasite and Biotite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
4.80-4.90
Uneven
{010} Indistinct
6-6.5
FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
 
Brittle
-
-
2.7-3.3
Uneven, Even
Perfect on the {001}
2.5-3.0
K(Mg,Fe++)3[AlSi3O10(OH,F)2

Marcasite and Biotite Chemical Formula

While comparing Marcasite and Biotite 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 Marcasite and Biotite chemical formula.

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Marcasite and Biotite Specific Gravity

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