mineral
Amethyst
Quartz (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, purple to violet color, vitreous luster, hexagonal crystal system, and no cleavage.
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Physical properties
Hardness of 7 on Mohs scale, purple to violet color, vitreous luster, hexagonal crystal system, and no cleavage.
Formation & geological history
Forms within gas cavities in volcanic rocks through hydrothermal processes involving iron impurities and natural irradiation.
Uses & applications
Widely used in high-end and alternative jewelry, decorative items, and crystal collecting.
Geological facts
Its purple color comes from irradiation of iron-doped quartz. Historically valued as a precious gemstone until large deposits were discovered in Brazil.
Field identification & locations
Easily identified by its distinct purple crystal points growing from a matrix base; commonly sourced from Brazil, Uruguay, and Zambia.
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