Amethyst (Raw Quartz)

Physical Properties

Hardness: 7 on Mohs scale; Color: Purple, violet, to pale lavender mixed with white quartz; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & Geological History

Formed in hydrothermal veins or cavities (geodes) when silica-rich water deposits crystals. The purple color comes from irradiation, iron impurities, and the presence of trace elements. Found in volcanic rocks and metamorphic terrains.

Uses & Applications

Predominantly used in jewelry, lapidary arts, and as decorative collector specimens. Historically used for amulets and carvings.

Geological Facts

The name comes from the Ancient Greek 'amethystos', meaning 'not intoxicated', as it was believed to protect the wearer from drunkenness. It is the birthstone for February.

Field Identification & Locations

Identify by its distinctive purple hue and lack of cleavage (it breaks like glass). Commonly found in Brazil, Uruguay, and Zambia. Collectors should look for deep saturation of color and clarity.

Identified on: 5/13/2026

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