mineral

Amethyst

Quartz (Silicon Dioxide with Iron impurities), SiO2

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

Hardness: 7 on Mohs scale
Color: Pale violet to deep purple
Luster: Vitreous/glassy

Identified June 28, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in hydrothermal veins and geodes, often within volcanic rocks. The purple color results from irradiation, iron impurities, and the presence of trace elements over millions of years.

Uses & applications

Extensively used in jewelry (facets and cabochons), decorative ornaments, and highly valued by mineral collectors and the metaphysical community.

Geological facts

Amethyst was considered a precious stone on par with diamond until large deposits were found in Brazil. The name comes from the Greek word 'amethystos', meaning 'not intoxicated'.

Field identification & locations

Identified by its purple color and hardness (it can scratch glass). Commonly found in Brazil, Uruguay, Zambia, and South Korea. Look for hexagonal crystal points and conchoidal fracturing.

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