mineral
Amethyst
Silicon dioxide (Quartz), SiO2
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed in hydrothermal veins and gas cavities (vugs) within igneous and metamorphic rocks through the cooling of silica-rich solutions.
Uses & applications
Widely used in high-end and commercial jewelry, decorative items, and crystal healing collections.
Geological facts
The purple color is caused by irradiation and trace amounts of iron substituting for silicon within the quartz lattice.
Field identification & locations
Identified by its distinct purple coloration and hardness capable of scratching glass; commonly found in Brazil, Uruguay, and Zambia.
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Granite (Phaneritic intrusive igneous rock)
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