Almandine and Kyanite Physical Properties

Almandine

Kyanite

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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

3.95-4.30

3.53-3.65

1.5 Fracture

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

Splintery, Brittle, Metallic

1.6 Cleavage

none

[100] perfect [010] imperfect with 79° angle between

1.7 Mohs Hardness

7-7.5

4-7

1.8 Chemical Composition

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

Not Available

Almandine and Kyanite Chemical Formula

While comparing Almandine and Kyanite 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 Kyanite chemical formula.

Chemical formula of Almandine- Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

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Almandine and Kyanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Almandine and Kyanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Almandine and Kyanite Optical Properties during the identification of gemstone. Specific gravity of Almandine is 3.53-3.65 whereas that of Kyanite is 3.53-3.65.