Afghanite and Chromite Physical Properties

Afghanite

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

2.55-2.654.5-4.8

1 7.18

1.5 Fracture

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

Uneven

1.6 Cleavage

Perfect {10 1 0}

None, parting may develop along {111}

1.7 Mohs Hardness

5.5-65.5

2 10

1.8 Chemical Composition

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

Fe++Cr2O4

Afghanite and Chromite Chemical Formula

While comparing Afghanite 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 Afghanite and Chromite chemical formula.

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

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Afghanite and Chromite Specific Gravity

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