Dumortierite and Chromite Physical Properties

Dumortierite

Chromite

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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

3.26-3.414.5-4.8

1 7.18

1.5 Fracture

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

Uneven

1.6 Cleavage

Distinct on {100}, poor on {110}; parting on {001}

None, parting may develop along {111}

1.7 Mohs Hardness

7-8.55.5

2 10

1.8 Chemical Composition

AlAl₆O₃BSi₃O₁₈

Fe++Cr2O4

Dumortierite and Chromite Chemical Formula

While comparing Dumortierite 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 Dumortierite and Chromite chemical formula.

Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈
Chemical formula of Chromite- Fe++Cr2O4

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Dumortierite and Chromite Specific Gravity

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