gemstone
Amethyst Gemstone
Crystalline Quartz (SiO2 with iron impurities)
Hardness: 7 (Mohs scale), Color: light purple/lavender, Luster: Vitreous (glassy), Structure: Trigonal/Hexagonal, Specific Gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: light purple/lavender, Luster: Vitreous (glassy), Structure: Trigonal/Hexagonal, Specific Gravity: 2.65
Formation & geological history
Formed in hydrothermal veins or as linings in geodes within volcanic rock. Purple color is caused by natural irradiation and trace iron impurities within the quartz lattice.
Uses & applications
Primarily used in jewelry (rings, earrings, necklaces) and as a birthstone for February. Also popular for decorative carvings and crystal healing collections.
Geological facts
The name comes from the Greek word 'amethystos', meaning 'not intoxicated', as it was believed to prevent drunkenness. It was once considered a Precious Stone alongside Diamond and Ruby until large deposits were found in Brazil.
Field identification & locations
Identify by its distinct purple hue and quartz-like transparency. In the field, it is often found inside hollow volcanic rocks (geodes). This specific specimen is a faceted cut intended for jewelry.
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