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Andalusite
Andalusite

Sardonyx
Sardonyx



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Andalusite
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Sardonyx

Andalusite and Sardonyx Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
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
 
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-
-
2.55-2.70
-
None
6.5-7
SiO 2Ulrich Henn and Claudio C.

Andalusite and Sardonyx Chemical Formula

While comparing Andalusite and Sardonyx 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 Andalusite and Sardonyx chemical formula.

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Andalusite and Sardonyx Specific Gravity

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