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Kyanite
Kyanite

Brookite
Brookite



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Kyanite
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Brookite

Kyanite and Brookite Physical Properties

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Physical Properties

Tenacity

Brittle
Brittle

Solubility

-
-

Durability

-
-

Specific Gravity

3.53-3.653.87-4.14
1 7.18
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Fracture

Splintery
Subconchoidal, Conchoidal

Cleavage

[100] perfect [010] imperfect with 79° angle between
Poor on {120}, in traces on {001}

Mohs Hardness

4-75.5-6
2 10
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Chemical Composition

Al2SiO5
TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Kyanite and Brookite Chemical Formula

While comparing Kyanite and Brookite 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 Brookite chemical formula.

  • Chemical formula of Kyanite- Al2SiO5
  • Chemical formula of Brookite- TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Kyanite and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Brookite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.87-4.14 whereas that of Brookite is 3.87-4.14.