mineral

Amethyst

Silicon Dioxide (SiO2) with Iron impurities

Hardness: 7 on Mohs scale; Color: Purple, violet, or lavender; Luster: Vitreous/Glassy; Crystal structure: Trigonal (Hexagonal system); Cleavage: None; Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Purple, violet, or lavender
Luster: Vitreous/Glassy

Identified June 24, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Purple, violet, or lavender; Luster: Vitreous/Glassy; Crystal structure: Trigonal (Hexagonal system); Cleavage: None; Specific gravity: 2.65

Formation & geological history

Formed in hydrothermal veins and basaltic geodes. The purple color results from irradiation of trivalent iron (Fe3+) impurities within the quartz crystal lattice. It is found in deposits ranging from millions of years old to relatively recent geological formations.

Uses & applications

Widely used for jewelry (rings, necklaces, earrings), ornamental carvings, and popular among mineral collectors for its aesthetic appeal. Also used in metaphysical practices.

Geological facts

Amethyst was considered a precious stone in ancient times, comparable to Diamond and Ruby, until large deposits were found in Brazil. The name comes from the Greek 'amethystos', meaning 'not intoxicated'.

Field identification & locations

Identified by its distinctive purple color and lack of cleavage. In the field, look for hexagonal crystal points or rounded basalt rocks (geodes) that may contain it. Major locations include Brazil, Uruguay, and Zambia.

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