Kyanite and Almandine Physical Properties

Kyanite

Almandine

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.53-3.65

3.95-4.30

1.5 Fracture

Splintery, Brittle, Metallic

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

1.6 Cleavage

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

none

1.7 Mohs Hardness

4-7

7-7.5

1.8 Chemical Composition

Not Available

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

Kyanite and Almandine Chemical Formula

While comparing Kyanite and Almandine 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 Kyanite and Almandine chemical formula.

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

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Kyanite and Almandine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Almandine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Almandine Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.95-4.30 whereas that of Almandine is 3.95-4.30.