mineral

Amethyst (vibrant lilac/purple variety)

Silicon Dioxide (SiO2) with iron impurities

Hardness: 7 (Mohs scale), Color: Varying shades of purple/violet, Luster: Vitreous/glassy, Crystal structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified February 24, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: Varying shades of purple/violet, Luster: Vitreous/glassy, Crystal structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins and basaltic geodes. Iron impurities and natural irradiation cause the violet color. Found in geologic environments ranging from prehistoric basalt flows to modern volcanic deposits.

Uses & applications

Primary use in jewelry, lapidary arts, and as a popular collector specimen. Historically used for carving and amulets.

Geological facts

The name comes from the Greek 'amethystos', meaning 'not intoxicated', based on an ancient belief that it prevented drunkenness. It is the birthstone for February.

Field identification & locations

Identify by its purple hue and 6-sided crystal habit. Look for color zoning (darker tips, lighter base). Commonly found in Brazil, Uruguay, and Namibia. Collectors look for clarity and deep color saturation.

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