mineral
Amethyst Geode
Silicon Dioxide (Quartz), SiO2
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple to violet color, vitreous luster, and trigonal crystal system with no cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, purple to violet color, vitreous luster, and trigonal crystal system with no cleavage.
Formation & geological history
Forms within gas cavities in volcanic rocks through the precipitation of silica-rich hydrothermal fluids over millions of years.
Uses & applications
Widely used in ornamental jewelry, decorative home displays, and metaphysical healing practices.
Geological facts
The purple color is caused by natural irradiation and trace amounts of iron substituting for silicon within the quartz crystal lattice.
Field identification & locations
Easily identified by its distinctive purple crystal points lining a rounded rock matrix; commonly sourced from Brazil and Uruguay.
