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Andalusite
Andalusite

Sardonyx
Sardonyx



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Andalusite
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Andalusite and Sardonyx Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.2 Specific Gravity
3.05-3.21
2.55-2.70
1.5 Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Not Available
1.6 Cleavage
Good on {110}, poor on {100}
Not Available
1.7 Mohs Hardness
7.5
6.5-7
1.8 Chemical Composition
Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references
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.

  • Chemical formula of Andalusite- Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references
  • Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.

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 and Sardonyx Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 2.55-2.70 whereas that of Sardonyx is 2.55-2.70.

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