mineral
Amethyst Cluster
Silicon dioxide (Quartz variety, $SiO_2$)
AI-generated identification · may be incorrectMohs hardness of 7, purple to violet color, vitreous luster, hexagonal crystal system, and conchoidal fracture.
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Physical properties
Mohs hardness of 7, purple to violet color, vitreous luster, hexagonal crystal system, and conchoidal fracture.
Formation & geological history
Forms in gas cavities within igneous or sedimentary rocks through hydrothermal solutions rich in iron.
Uses & applications
Widely used in fine jewelry, decorative home displays, and spiritual or metaphysical practices.
Geological facts
The purple color is caused by iron impurities combined with natural irradiation. Large deposits are notably found in Brazil and Uruguay.
Field identification & locations
Identified by its characteristic purple quartz crystal points growing from a common base matrix; common in rock shops.
