mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Hardness: 7 (Mohs scale), Color: Purple to violet, Luster: Vitreous (glass-like), Crystal Structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified May 23, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: Purple to violet, Luster: Vitreous (glass-like), Crystal Structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Forms in hydrothermal veins and basaltic geodes. Its purple hue is caused by irradiation, iron impurities, and the presence of trace elements within the crystal lattice during formation over millions of years.

Uses & applications

Extensively used in jewelry (rings, necklaces, earrings), as decorative specimens for home decor, and highly valued by mineral collectors and metaphysical practitioners.

Geological facts

Amethyst is the birthstone for February. Ancient Greeks believed it could prevent intoxication, which is why the name comes from the Greek word 'amethystos' meaning 'not intoxicated'.

Field identification & locations

Identify by its distinct purple color, hexagonal crystal points, and lack of cleavage. Common in Brazil, Uruguay, and Africa. Collectors should look for deep uniform color and clarity.