Chromite and Sillimanite Physical Properties

Chromite

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

4.5-4.83.20-3.26

1 7.18

1.5 Fracture

Uneven

Splintery

1.6 Cleavage

None, parting may develop along {111}

{010} perfect

1.7 Mohs Hardness

5.56-7.5

2 10

1.8 Chemical Composition

Fe++Cr2O4

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

Chromite and Sillimanite Chemical Formula

While comparing Chromite 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 Chromite and Sillimanite chemical formula.

Chemical formula of Chromite- Fe++Cr2O4
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Brown Gemstones

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Chromite and Sillimanite Specific Gravity

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