mineral
Amethyst Cluster
Quartz (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple to violet color, vitreous luster, hexagonal crystal system, conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, purple to violet color, vitreous luster, hexagonal crystal system, conchoidal fracture.
Formation & geological history
Forms in hydrothermal veins and gas cavities within volcanic rocks as silica-rich solutions cool over millions of years.
Uses & applications
Widely used in fine jewelry, decorative ornamental items, and crystal collections.
Geological facts
The purple color is caused by irradiation and trace amounts of iron impurities within the quartz crystal lattice.
Field identification & locations
Easily identified by its distinctive purple crystal points growing from a common base; major deposits are found in Brazil, Uruguay, and Zambia.
