mineral

Amethyst

Quartz (Silicon Dioxide with iron impurities), SiO2

Hardness: 7 Mohs scale; Color: Purple to violet; Luster: Vitreous; Crystal system: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Hardness: 7 Mohs scale
Color: Purple to violet
Luster: Vitreous

Identified May 4, 2026More mineral →

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Physical properties

Hardness: 7 Mohs scale; Color: Purple to violet; Luster: Vitreous; Crystal system: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Formation & geological history

Formed in hydrothermal veins and basaltic geodes through the deposition of silica-rich solutions where iron impurities are subjected to natural irradiation.

Uses & applications

Primarily used in jewelry (rings, brooches, necklaces), ornamental carvings, and as a popular collector's mineral.

Geological facts

Amethyst was considered a precious stone equal to diamond or ruby until large deposits were found in Brazil. The name comes from the Ancient Greek 'amethystos', meaning 'not intoxicated'.

Field identification & locations

Identified by its signature purple color, hexagonal crystal shape, and quartz-like hardness. Found globally in regions like Brazil, Uruguay, and Africa.

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