gemstone
Amethyst Crescent
Quartz (Silicon Dioxide, SiO2)
Hardness 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 (vesicles) in volcanic rocks, commonly associated with basaltic lavas over millions of years
Uses & applications
Used primarily in jewelry making, ornamental carvings, crystal healing, and metaphysical practices
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 distinct purple coloration and conchoidal fracture; found worldwide with major deposits in Brazil, Uruguay, and Zambia
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