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Tourmaline and Ettringite Physical Properties


Ettringite and Tourmaline Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Partially soluble in water   

Durability
Not Available   
Not Available   

Specific Gravity
2.85-3.35   
1.77   

Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)   
Not Available   

Cleavage
Indistinct   
Perfect on {10 1 0}   

Mohs Hardness
7-7.5   
2-2.5   

Chemical Composition
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.   
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)   

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Tourmaline and Ettringite Chemical Formula

While comparing Tourmaline and Ettringite 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 Tourmaline and Ettringite chemical formula.

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Tourmaline and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tourmaline and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tourmaline and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Tourmaline is 1.77 whereas that of Ettringite is 1.77.

Semi Precious

Semi Precious


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