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Amethyst
Amethyst

Ettringite
Ettringite



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Amethyst
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Ettringite

Amethyst and Ettringite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
insoluble in common solvents
-
2.65
Conchoidal, ConchoidalWalter Schumann
Indiscernible
7
SiO2
 
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Partially soluble in water
-
1.77
-
Perfect on {10 1 0}
2-2.5
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Amethyst and Ettringite Chemical Formula

While comparing Amethyst 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 Amethyst and Ettringite chemical formula.

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Amethyst and Ettringite Specific Gravity

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