Afghanite and Hematite Physical Properties

Afghanite

Hematite

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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

2.55-2.65

5.00-5.30

1.5 Fracture

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

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

1.6 Cleavage

Perfect {10 1 0}

None, may show partings on {0001} and {10 1 1}

1.7 Mohs Hardness

5.5-6

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 2O 3Arthur Thomas , Gemstones (2009)

Afghanite and Hematite Chemical Formula

While comparing Afghanite and Hematite 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 Hematite 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 Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)

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Afghanite and Hematite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Afghanite and Hematite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Hematite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 5.00-5.30 whereas that of Hematite is 5.00-5.30.