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Andradite and Tourmaline Physical Properties


Tourmaline and Andradite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.70-4.10   
2.85-3.35   

Fracture
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)   
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)   

Cleavage
none   
Indistinct   

Mohs Hardness
6.5-7   
7-7.5   

Chemical Composition
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)   
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.   

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Andradite and Tourmaline Chemical Formula

While comparing Andradite and Tourmaline 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 Andradite and Tourmaline chemical formula.

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Andradite and Tourmaline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Andradite and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Andradite and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Andradite is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.

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Green Gemstones


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