Kyanite and Taaffeite Physical Properties

Kyanite

Taaffeite

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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

3.53-3.653.60-3.61

1 7.18

1.5 Fracture

Splintery, Brittle, Metallic

Conchoidal

1.6 Cleavage

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

Imperfect/fair/absent

1.7 Mohs Hardness

4-78-8.5

2 10

1.8 Chemical Composition

Not Available

Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references

Kyanite and Taaffeite Chemical Formula

While comparing Kyanite and Taaffeite 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 Taaffeite chemical formula.

Chemical formula of Taaffeite- Mg 3Al 8BeO 16Walter Schumann , Gemstones of the world (2001) More from other references

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Kyanite and Taaffeite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Taaffeite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Taaffeite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.60-3.61 whereas that of Taaffeite is 3.60-3.61.