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Kyanite
Kyanite

Bertrandite
Bertrandite



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Kyanite
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Bertrandite

Kyanite and Bertrandite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
3.53-3.65
Splintery
[100] perfect [010] imperfect with 79° angle between
4-7
Al2SiO5
 
-
-
-
2.59-2.60
-
{001} Perfect, {110} Distinct, {101} Distinct
6-7
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

Kyanite and Bertrandite Chemical Formula

While comparing Kyanite and Bertrandite 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 Bertrandite chemical formula.

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Kyanite and Bertrandite Specific Gravity

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