Kyanite and Foitite Physical Properties

Kyanite

Foitite

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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

3.53-3.653.17

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Handbook of mineralogy (2001)

1.6 Cleavage

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

None

1.7 Mohs Hardness

4-77

2 10

1.8 Chemical Composition

Not Available

Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)

Kyanite and Foitite Chemical Formula

While comparing Kyanite and Foitite 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 Foitite chemical formula.

Chemical formula of Foitite- Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)

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Kyanite and Foitite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Foitite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Foitite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.17 whereas that of Foitite is 3.17.