mineral

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2) with trace Iron (Fe)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Purple with white quartz banding; Luster: Vitreous (glassy); Crystal Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Purple with white quartz banding
Luster: Vitreous (glassy)

Identified May 3, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Purple with white quartz banding; Luster: Vitreous (glassy); Crystal Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or as linings in geodes within igneous or metamorphic rocks through the presence of manganese and iron impurities exposed to irradiation.

Uses & applications

Predominantly used for jewelry, lapidary work, decorative carvings, and as a popular semi-precious gemstone for mineral collectors.

Geological facts

Amethyst was considered a cardinal gem and was worth as much as diamond until large deposits were found in Brazil. Chevron amethyst is a mix of amethyst and white quartz, creating a V-shaped or banded pattern.

Field identification & locations

Identify by its distinct purple hue and V-shaped white quartz bands. Commonly found in Brazil, Uruguay, and Africa. It is highly resistant to scratching compared to glass or softer stones.