mineral

Amethyst (Tumbled Chips)

Amethyst (Silicon Dioxide with Iron impurities, SiO2)

Hardness: 7 on Mohs scale; Color: Pale lavender to deep violet; Luster: Vitreous (glass-like); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Pale lavender to deep violet
Luster: Vitreous (glass-like)

Identified April 4, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Pale lavender to deep violet; Luster: Vitreous (glass-like); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins and hollow cavities (geodes) when silica-rich water precipitates in volcanic rock. The purple color is caused by irradiation of iron impurities within the quartz crystal lattice.

Uses & applications

Primarily used for jewelry (bracelets, necklaces), ornamental carvings, and as a popular collector's mineral for metaphysical purposes.

Geological facts

Amethyst was considered one of the 'Cardinal Gems' until large deposits were found in Brazil in the 1700s. The name comes from the Ancient Greek 'amethystos', meaning 'not intoxicated', as it was believed to prevent drunkenness.

Field identification & locations

Identify by its purple hue, hexagonal crystal habits (if raw), and its ability to scratch glass but not topaz. Commonly found in Brazil, Uruguay, Zambia, and South Korea.

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