gemstone
Amethyst
Silicon Dioxide (Quartz variety)
Hardness of 7 on the Mohs scale, purple to violet color, vitreous luster, hexagonal 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, hexagonal crystal system, conchoidal fracture, specific gravity of 2.65
Formation & geological history
Formed in hydrothermal veins and cavities within volcanic rocks (vugs or geodes) as iron impurities are irradiated within a quartz matrix.
Uses & applications
Used primarily in jewelry, ornamental carvings, crystal healing, and mineral collecting.
Geological facts
Amethyst was once considered as valuable as diamond, ruby, and emerald until large deposits were discovered in Brazil during the 19th century.
Field identification & locations
Easily identified by its distinctive purple coloration and quartz hardness; commonly found worldwide, particularly in Brazil, Uruguay, Zambia, and the USA.
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