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Kyanite
Kyanite

Legrandite
Legrandite



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Kyanite
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Legrandite

Kyanite and Legrandite 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
 
Brittle
-
-
3.98-4.04
Conchoidal
Imperfect, poor one {100}
4.5-5
Zn 2(AsO 4)(OH) · H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Kyanite and Legrandite Chemical Formula

While comparing Kyanite and Legrandite 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 Legrandite chemical formula.

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Kyanite and Legrandite Specific Gravity

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