mineral
Amethyst Geode
Quartz (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple color caused by iron irradiation, vitreous luster, and trigonal crystal system with conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, purple color caused by iron irradiation, vitreous luster, and trigonal crystal system with conchoidal fracture.
Formation & geological history
Formed within gas cavities in volcanic basalt lavas, where silica-rich hydrothermal fluids precipitated quartz crystals over millions of years.
Uses & applications
Widely used in decorative home displays, holistic crystal healing, and as a popular gemstone for jewelry.
Geological facts
Amethyst was once considered as valuable as diamond, ruby, and emerald until large deposits were discovered in Brazil.
Field identification & locations
Easily identified by its distinctive purple quartz crystal points lining the interior cavity of a basalt or chalcedony shell. Commonly sourced from Brazil, Uruguay, and Zambia.
