mineral
Amethyst
Silicon Dioxide (Quartz variety), SiO2
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, and a 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 with no true cleavage, and a specific gravity of 2.65.
Formation & geological history
Formed in hydrothermal veins and gas cavities within volcanic rocks as silica-rich solutions cool and crystallize over millions of years.
Uses & applications
Widely used as a gemstone in jewelry, for ornamental carvings, and prized by mineral collectors.
Geological facts
Amethyst was once considered as precious as a diamond until extensive deposits were discovered in Brazil during the 19th century.
Field identification & locations
Identified easily by its distinctive purple coloration and 7 Mohs hardness; commonly found in Brazil, Uruguay, and various locations in the United States.
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