mineral
Amethyst Cluster
Quartz (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectMohs hardness of 7, purple to violet color, vitreous luster, hexagonal crystal system, and conchoidal fracture with no true cleavage.
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Physical properties
Mohs hardness of 7, purple to violet color, vitreous luster, hexagonal crystal system, and conchoidal fracture with no true cleavage.
Formation & geological history
Formed through the precipitation of silica-rich hydrothermal fluids within gas cavities in basaltic volcanic rocks over millions of years.
Uses & applications
Widely used in jewelry, decorative ornaments, crystal healing, and as a popular specimen for mineral collectors.
Geological facts
The purple color is caused by natural irradiation and trace amounts of iron substituting for silicon within the crystal lattice.
Field identification & locations
Easily identified by its distinctive purple color and hexagonal crystal terminations; commonly found in Brazil, Uruguay, and Zambia.
