Hibonite and Afghanite Physical Properties

Hibonite

Afghanite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.84

2.55-2.65

1.5 Fracture

Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

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

1.6 Cleavage

{0001} good, {10 1 0} parting

Perfect {10 1 0}

1.7 Mohs Hardness

7.5-8

5.5-6

1.8 Chemical Composition

(Ca,Ce)(Al,Ti,Mg)12O19

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

Hibonite and Afghanite Chemical Formula

While comparing Hibonite 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 Hibonite and Afghanite chemical formula.

Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19
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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Hibonite and Afghanite Specific Gravity

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