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Andalusite and Apatite Physical Properties


Apatite 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   
3.16-3.23   

Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)   
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven   

Cleavage
Good on {110}, poor on {100}   
[0001] indistinct, [1010] indistinct   

Mohs Hardness
7.5   
5   

Chemical Composition
Al 2SiO 5Michael O’Donoghue , Gems, Sixth edition (2006) More from other references   
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references   

Optical Properties >>
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Andalusite and Apatite Chemical Formula

While comparing Andalusite and Apatite 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 Apatite chemical formula.

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Andalusite and Apatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andalusite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andalusite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Andalusite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.

Brown Gemstones

Brown Gemstones


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