Chromite and Afghanite Physical Properties

Chromite

Afghanite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.5-4.82.55-2.65

1 7.18

1.5 Fracture

Uneven

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle

1.6 Cleavage

None, parting may develop along {111}

Perfect {10 1 0}

1.7 Mohs Hardness

5.55.5-6

2 10

1.8 Chemical Composition

Fe++Cr2O4

(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

Chromite and Afghanite Chemical Formula

While comparing Chromite and Afghanite 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 Afghanite chemical formula.

Chemical formula of Chromite- Fe++Cr2O4
Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)

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Chromite and Afghanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chromite and Afghanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chromite and Afghanite Optical Properties during the identification of gemstone. Specific gravity of Chromite is 2.55-2.65 whereas that of Afghanite is 2.55-2.65.