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Brookite
Brookite

Kyanite
Kyanite



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Brookite and Kyanite Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.87-4.14
3.53-3.65
1.5 Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Splintery, Brittle, Metallic
1.6 Cleavage
Poor on {120}, in traces on {001}
[100] perfect [010] imperfect with 79° angle between
1.7 Mohs Hardness
5.5-6
4-7
1.8 Chemical Composition
TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Not Available

Brookite and Kyanite Chemical Formula

While comparing Brookite 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 Brookite and Kyanite chemical formula.

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

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