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Kyanite
Kyanite

Faustite
Faustite



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Kyanite
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Faustite

Kyanite and Faustite Physical Properties

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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
 
-
-
-
2.9
Conchoidal
{???} Indistinct
4.5
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Kyanite and Faustite Chemical Formula

While comparing Kyanite and Faustite 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 Faustite chemical formula.

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Kyanite and Faustite Specific Gravity

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