mineral

Amethyst and Smoky Quartz (Tumbled)

Silicon Dioxide (SiO2) with trace impurities iron (Amethyst) and aluminum/radiation (Smoky Quartz)

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale); Colors: Purple, violet, smoky brown, black; Luster: Vitreous/glassy; Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Hardness: 7 (Mohs scale)
Luster: Vitreous/glassy

Identified July 7, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Colors: Purple, violet, smoky brown, black; Luster: Vitreous/glassy; Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Formation & geological history

Formed in igneous and metamorphic environments, specifically in hydrothermal veins and basaltic geodes. Purple color comes from iron irradiation; smoky color comes from natural gamma irradiation of aluminum impurities.

Uses & applications

Ornamental use, jewelry (cabochons and beads), metaphysical practices, and mineral collection.

Geological facts

Amethyst was considered a cardinal gem until large deposits were found in Brazil. Its name comes from the Ancient Greek word 'amethystos', meaning 'not intoxicated', as it was believed to prevent drunkenness.

Field identification & locations

Identify by purple and smoky hues, glass-like luster, and lack of cleavage. Commonly found in Brazil, Uruguay, Madagascar, and the USA. Collectors look for clarity and deep color saturation.