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Ettringite and Amethyst Physical Properties


Amethyst and Ettringite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Partially soluble in water   
insoluble in common solvents   

Durability
Not Available   
Not Available   

Specific Gravity
1.77   
2.65   

Fracture
Not Available   
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)   

Cleavage
Perfect on {10 1 0}   
Indiscernible   

Mohs Hardness
2-2.5   
7   

Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)   
SiO2   

Optical Properties >>
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Ettringite and Amethyst Chemical Formula

While comparing Ettringite and Amethyst 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 Ettringite and Amethyst chemical formula.

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Ettringite and Amethyst Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.65 whereas that of Amethyst is 2.65.

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