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Andalusite
Andalusite

Star Sapphire
Star Sapphire



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Andalusite
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Star Sapphire

Andalusite and Star Sapphire 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
 
-
-
-
3.90-4.05
-
None
-9999
Al 2O 3Ulrich Henn and Claudio C.

Andalusite and Star Sapphire Chemical Formula

While comparing Andalusite and Star Sapphire 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 Star Sapphire chemical formula.

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Andalusite and Star Sapphire Specific Gravity

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