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Chromite
Chromite

Poudretteite
Poudretteite



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Chromite
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Poudretteite

Chromite and Poudretteite Physical Properties

Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

4.5-4.82.51-2.53
1 7.18
👆🏻

Fracture

Uneven
Conchoidal, Splintery

Cleavage

None, parting may develop along {111}
None

Mohs Hardness

5.55
2 10
👆🏻

Chemical Composition

Fe++Cr2O4
KNa 2B 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006)

Chromite and Poudretteite Chemical Formula

While comparing Chromite and Poudretteite 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 Poudretteite chemical formula.

  • Chemical formula of Chromite- Fe++Cr2O4
  • Chemical formula of Poudretteite- KNa 2B 3Si 12O 30Michael O’Donoghue , Gems, Sixth Edition (2006)

Chromite and Poudretteite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chromite and Poudretteite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chromite and Poudretteite Optical Properties during the identification of gemstone. Specific gravity of Chromite is 2.51-2.53 whereas that of Poudretteite is 2.51-2.53.