mineral

Amethyst crystal

Silicon Dioxide (SiO2) with iron impurities

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale), Color: Purple to violet with clear/white base, Luster: Vitreous (glassy), Crystal structure: Hexagonal/Trigonal, Cleavage: None (conchoidal fracture)

Identified July 14, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: Purple to violet with clear/white base, Luster: Vitreous (glassy), Crystal structure: Hexagonal/Trigonal, Cleavage: None (conchoidal fracture)

Formation & geological history

Formed in hydrothermal veins or as linings in geodes within igneous and metamorphic rocks. The purple color comes from irradiation of iron impurities within the quartz lattice.

Uses & applications

Primarily used in jewelry, as a decorative gemstone, and in mineral collections. Well-formed crystals are highly sought after by collectors.

Geological facts

Amethyst is the birthstone for February. Its name comes from the Ancient Greek 'amethystos', meaning 'not intoxicated', as it was believed to protect its owner from drunkenness.

Field identification & locations

Identified by its distinctive purple hue and hexagonal crystal habit. Common locations include Brazil, Uruguay, Zambia, and South Korea. Collectors should look for deep uniform color and crystal clarity.