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Spinel and Amethyst Physical Properties


Amethyst and Spinel Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
none   
insoluble in common solvents   

Durability
Not Available   
Not Available   

Specific Gravity
3.64-3.66   
2.65   

Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)   
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)   

Cleavage
None, but may exhibit slight parting   
Indiscernible   

Mohs Hardness
8   
7   

Chemical Composition
MgAl2O4   
SiO2   

Optical Properties >>
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Spinel and Amethyst Chemical Formula

While comparing Spinel 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 Spinel and Amethyst chemical formula.

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Spinel and Amethyst Specific Gravity

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

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