Bornite and Sillimanite Physical Properties

Bornite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.06-5.083.20-3.26

1 7.18

1.5 Fracture

Uneven, Subconchoidal, Conchoidal, Brittle

Splintery

1.6 Cleavage

Poor on [111].

{010} perfect

1.7 Mohs Hardness

3-3.256-7.5

2 10

1.8 Chemical Composition

Cu5FeS4

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Bornite and Sillimanite Chemical Formula

While comparing Bornite and Sillimanite 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 Sillimanite chemical formula.

Chemical formula of Bornite- Cu5FeS4
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Bornite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bornite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bornite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Bornite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.