mineral
Amethyst
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, and no cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, and no cleavage.
Formation & geological history
Forms within gas cavities in volcanic rocks through hydrothermal processes involving silica-rich fluids and iron impurities.
Uses & applications
Widely used in jewelry, ornamental carvings, crystal healing, and mineral collecting.
Geological facts
The purple color is caused by irradiation and trace amounts of iron substituting for silicon in the crystal lattice. Ancient Greeks believed it prevented intoxication.
Field identification & locations
Easily identified by its distinct purple color and conchoidal fracture. Commonly found in Brazil, Uruguay, Zambia, and the USA.
