gemstone

Amethyst

Silicon Dioxide (SiO2) with iron impurities

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Pale lavender to deep violet; Luster: Vitreous; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Pale lavender to deep violet
Luster: Vitreous

Identified July 6, 2026More gemstone →

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Physical properties

Hardness: 7 on Mohs scale; Color: Pale lavender to deep violet; Luster: Vitreous; Crystal Structure: Hexagonal (trigonal); Cleavage: None; Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins and cavities (geodes) of igneous and metamorphic rocks. The purple color is caused by irradiation of trivalent iron impurities within the quartz structure.

Uses & applications

Predominantly used as a gemstone for jewelry, ornamental carvings, and by collectors for its aesthetic and alleged metaphysical properties.

Geological facts

Amethyst was considered a 'Precious Stone' alongside Diamond and Ruby until large deposits were found in Brazil. The name comes from the Greek 'amethystos', meaning 'not intoxicated', as it was believed to prevent drunkenness.

Field identification & locations

Identified by its purple color and hexagonal crystal termination. It is commonly found in Brazil, Uruguay, Zambia, and South Korea. Collectors should look for deep, uniform color and clarity.