gemstone
Amethyst
Quartz (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, conchoidal fracture with no cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, conchoidal fracture with no cleavage.
Formation & geological history
Forms within gas cavities in volcanic rocks through hydrothermal solutions rich in iron at low temperatures.
Uses & applications
Widely used as a semi-precious gemstone in jewelry, decorative carvings, and mineral collecting.
Geological facts
The purple color is caused by iron impurities combined with natural irradiation. Historically considered a precious gemstone until large deposits were found in Brazil.
Field identification & locations
Identified by its distinctive purple hue and 7 hardness, commonly sourced from Brazil, Uruguay, and Zambia.
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