mineral

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Hardness: 7 on the Mohs scale; Color: Ranges from light lilac to deep purple; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on the Mohs scale
Color: Ranges from light lilac to deep purple
Luster: Vitreous (glassy)

Identified February 14, 2026More mineral →

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Physical properties

Formation & geological history

Formed in hydrothermal veins and basaltic geodes. Its purple color is the result of irradiation, iron impurities, and the presence of trace elements. Significant deposits range from several hundred thousand to millions of years old.

Uses & applications

Primarily used as a gemstone in jewelry, for ornamental carvings, and widely collected as mineral specimens. It also has historical significance in various spiritual and cultural practices.

Geological facts

Amethyst was considered one of the 'Cardinals Gems' until large deposits were found in Brazil. Its name comes from the Ancient Greek 'amethystos', meaning 'not intoxicated', as it was believed to protect the wearer from drunkenness.

Field identification & locations

Identify in the field by its purple hue and hexagonal crystal shape if intact. It can be found in abundance in Brazil, Uruguay, Zambia, and South Korea. Collectors should look for deep, uniform color (often called 'Siberian' quality) and high clarity.

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