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Bornite
Bornite

Almandine
Almandine



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Bornite
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Almandine

Bornite and Almandine Physical Properties

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Physical Properties

Tenacity

Brittle
-

Solubility

-
-

Durability

-
-

Specific Gravity

5.06-5.083.95-4.30
1 7.18
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Fracture

Uneven, Subconchoidal, Conchoidal
Conchoidal

Cleavage

Poor on [111].
none

Mohs Hardness

3-3.257-7.5
2 10
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Chemical Composition

Cu5FeS4
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Bornite and Almandine Chemical Formula

While comparing Bornite and Almandine 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 Bornite and Almandine chemical formula.

  • Chemical formula of Bornite- Cu5FeS4
  • Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Bornite and Almandine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bornite and Almandine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bornite and Almandine Optical Properties during the identification of gemstone. Specific gravity of Bornite is 3.95-4.30 whereas that of Almandine is 3.95-4.30.