gemstone
Amethyst Ring
Quartz (Silicon Dioxide, SiO2 with iron impurities)
Hardness of 7 on the Mohs scale; purple to violet color; vitreous luster; hexagonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale; purple to violet color; vitreous luster; hexagonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65
Formation & geological history
Forms within gas cavities in volcanic rocks (geodes) or hydrothermal veins, where silica-rich water containing trace amounts of iron is exposed to natural irradiation
Uses & applications
Used primarily as a gemstone in jewelry, decorative ornaments, and metaphysical crystal healing
Geological facts
Amethyst was once considered one of the cardinal precious stones, equal in value to diamond and ruby until large deposits were discovered in Brazil
Field identification & locations
Easily identified by its distinct purple coloration and quartz crystal properties, commonly found in Brazil, Uruguay, Zambia, and the United States
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