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Jet
Jet

Andalusite
Andalusite



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Jet
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Andalusite

Jet and Andalusite Physical Properties

Jet
Jet
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.19-1.35
ConchoidalWalter Schumann
None
2.5-4
C
 
-
-
-
3.05-3.21
Uneven, Subconchoidal, Splintery
Good on {110}, poor on {100}
7.5
Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references

Jet and Andalusite Chemical Formula

While comparing Jet and Andalusite 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 Jet and Andalusite chemical formula.

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Jet and Andalusite Specific Gravity

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