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Bustamite
Bustamite

Kyanite
Kyanite



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Bustamite
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Kyanite

Bustamite and Kyanite Physical Properties

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Physical Properties

Tenacity

-
Brittle

Solubility

Partly soluble in HCl.
-

Durability

-
-

Specific Gravity

3.32-3.433.53-3.65
1 7.18
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Fracture

Conchoidal
Splintery

Cleavage

{100} perfect; {110} and {1 1 0} good; {010} poor
[100] perfect [010] imperfect with 79° angle between

Mohs Hardness

5.5-64-7
2 10
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Chemical Composition

(Ca,Mn2+ )Si 3O 9Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
Al2SiO5

Bustamite and Kyanite Chemical Formula

While comparing Bustamite 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 Bustamite and Kyanite chemical formula.

  • Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Kyanite- Al2SiO5

Bustamite and Kyanite Specific Gravity

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