gemstone
Amethyst
Silicon Dioxide, Quartz variety (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, purple to violet color, vitreous luster, hexagonal crystal system, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on Mohs scale, purple to violet color, vitreous luster, hexagonal crystal system, conchoidal fracture with no true cleavage.
Formation & geological history
Formed in hydrothermal veins and gas cavities within volcanic rocks as silica-rich fluids cool over millions of years.
Uses & applications
Widely used in fine jewelry, decorative carvings, and as a popular mineral specimen for collectors.
Geological facts
The purple color is caused by natural irradiation and trace amounts of iron substituting for silicon within the crystal lattice.
Field identification & locations
Easily identified by its distinct purple coloration, high hardness, and vitreous luster; commonly sourced from Brazil, Uruguay, and Zambia.
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