Ruby and Chromite Physical Properties

Ruby

Chromite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.97-4.054.5-4.8

1 7.18

1.5 Fracture

Conchoidal

Uneven

1.6 Cleavage

No true cleavage

None, parting may develop along {111}

1.7 Mohs Hardness

95.5

2 10

1.8 Chemical Composition

Al ₂ O ₃

Fe++Cr2O4

Ruby and Chromite Chemical Formula

While comparing Ruby and Chromite 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 Ruby and Chromite chemical formula.

Chemical formula of Ruby- Al ₂ O ₃
Chemical formula of Chromite- Fe++Cr2O4

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Ruby and Chromite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ruby and Chromite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Chromite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 4.5-4.8 whereas that of Chromite is 4.5-4.8.