Almandine and Bornite Physical Properties

Almandine

Bornite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.95-4.30

5.06-5.08

1.5 Fracture

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Uneven, Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

none

Poor on [111].

1.7 Mohs Hardness

7-7.5

3-3.25

1.8 Chemical Composition

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

Cu5FeS4

Almandine and Bornite Chemical Formula

While comparing Almandine and Bornite 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 Almandine and Bornite chemical formula.

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

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Almandine and Bornite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Bornite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Bornite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 5.06-5.08 whereas that of Bornite is 5.06-5.08.