Almandine and Hibonite Physical Properties

Almandine

Hibonite

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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

3.95-4.30

3.84

1.5 Fracture

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

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

1.6 Cleavage

none

{0001} good, {10 1 0} parting

1.7 Mohs Hardness

7-7.5

7.5-8

1.8 Chemical Composition

Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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

Almandine and Hibonite Chemical Formula

While comparing Almandine and Hibonite 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 Almandine and Hibonite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19

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Almandine and Hibonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Hibonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Hibonite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 3.84 whereas that of Hibonite is 3.84.