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Andalusite and Rubellite Physical Properties


Rubellite and Andalusite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.05-3.21   
3.01-3.06   

Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)   
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)   

Cleavage
Good on {110}, poor on {100}   
Not Available   

Mohs Hardness
7.5   
7-7.5   

Chemical Composition
Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references   
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.   

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Andalusite and Rubellite Chemical Formula

While comparing Andalusite and Rubellite 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 Rubellite chemical formula.

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Andalusite and Rubellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Rubellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Rubellite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.01-3.06 whereas that of Rubellite is 3.01-3.06.

Brown Gemstones

Brown Gemstones


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