mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Hardness: 7 (Mohs scale), Color: Purple to violet, Luster: Vitreous (glassy), Crystal Structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Purple to violet, Luster: Vitreous (glassy), Crystal Structure: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or as linings in geodes within volcanic rock, created through a combination of silica rich fluids and natural radiation affecting iron traces.
Uses & applications
Used extensively in jewelry as gemstones, in decorative ornaments, and highly valued by mineral collectors and practitioners of crystal healing.
Geological facts
Amethyst was considered a precious stone on par with diamonds 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 quartz-like fracture. Common locations include Brazil, Uruguay, Africa, and Siberia. Collectors look for deep color and clarity.
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