mineral
Amethyst
Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, and conchoidal fracture.
Identified More mineral →
Explore Amethyst in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 7 on the Mohs scale, purple to violet color, vitreous luster, trigonal crystal system, and conchoidal fracture.
Formation & geological history
Forms in hydrothermal veins and gas cavities within volcanic rocks as silica-rich fluids cool over time.
Uses & applications
Used primarily in jewelry, decorative ornamental items, and crystal collecting.
Geological facts
The purple color is caused by iron impurities and natural irradiation. Ancient Greeks believed it prevented intoxication.
Field identification & locations
Identified by its distinct purple hue and quartz crystal structure; found globally with major deposits in Brazil and Uruguay.
