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Amethyst Rough Uncut

Properties

Mineral group: Quarts  
Chemistry: SiO2
Color: Violet, Redviolet
Crystal system: Trigonal
Mohs Scale hardness: 7
Refractive index: 1,544-1,553
Birefringence: +0,009
Specific gravity: 2,63-2,65

Other

Amethyst is one varity of Quarts, the most popular one. In Sweden Amethyst have been used as jewelry stone since vikings. Deposits in many places like Brasil, Madagascar and Uruguay.

Read/Learn more about Amethyst under "Gemstoneinformation"

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