gemstone
Amethyst
Quartz (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, and no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, and no true cleavage.
Formation & geological history
Forms in gas cavities of volcanic rocks through the crystallization of silica-rich hydrothermal fluids over millions of years.
Uses & applications
Widely used in jewelry, decorative ornaments, and crystal healing collections.
Geological facts
The purple color is caused by iron irradiation and trace elements within the quartz crystal lattice. It was historically considered a precious gemstone.
Field identification & locations
Identified by its distinct purple color and conchoidal fracture. Commonly sourced from Brazil, Uruguay, and Zambia.
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