mineral
Amethyst Geode
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple to pale violet color, vitreous luster, and hexagonal crystal system with no cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, purple to pale violet color, vitreous luster, and hexagonal crystal system with no cleavage.
Formation & geological history
Formed in hollow cavities of volcanic rocks through the cooling of silica-rich hydrothermal solutions over millions of years.
Uses & applications
Widely used in fine jewelry, ornamental carvings, crystal healing, and as coveted decorative mineral specimens.
Geological facts
Amethyst is the purple variety of quartz, and its color is caused by natural irradiation and trace amounts of iron.
Field identification & locations
Easily identified by its distinctive purple quartz crystals lining a rock matrix cavity; commonly sourced from Brazil, Uruguay, and Zambia.
