Mineral

Amethyst (Chevron or Banded Amethyst)

Silicon Dioxide (SiO2 with iron impurities)

Hardness: 7 on Mohs scale; Color: Purple with translucent white bands; Luster: Vitreous (glass-like); Crystal structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Purple with translucent white bands
Luster: Vitreous (glass-like)

Identified March 18, 2026More mineral →

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Physical properties

Formation & geological history

Formed in hydrothermal veins or volcanic geodes when silicon dioxide-rich water cools and crystallizes. The purple color is caused by gamma irradiation of trace iron minerals. The banded 'Chevron' pattern occurs through cyclical growth phases of amethyst and milky quartz.

Uses & applications

Predominantly used for jewelry (faceted or cabochons), ornamental carvings, crystal healing practices, and as a popular collector's specimen.

Geological facts

Commonly called 'Dream Amethyst' in metaphysical circles. Historically, the name comes from the Greek word 'amethystos', meaning 'not intoxicated', as it was once believed to prevent drunkenness.

Field identification & locations

Identify in the field by its distinct purple hue and white V-shaped or concentric banding. It can scratch glass and does not have a streak color. Major deposits are found in Brazil, Uruguay, Zambia, and South Africa.

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