mineral

Amethyst (Rose-tinted variation)

Silicon Dioxide (SiO2) with trace iron impurities

Hardness: 7 (Mohs); Color: Pale purple to lavender; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 (Mohs)
Color: Pale purple to lavender
Luster: Vitreous (glassy)

Identified April 23, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs); Color: Pale purple to lavender; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or as linings in geodes. The purple color is caused by natural irradiation of trace iron impurities within the quartz crystal lattice.

Uses & applications

Primary use is in jewelry, lapidary art, and as decorative collector specimens. High-purity quartz also has industrial uses in electronics.

Geological facts

Amethyst is the most valuable variety of quartz. Its name comes from the Ancient Greek word 'amethystos', meaning 'not intoxicated', as it was believed to protect its owner from drunkenness.

Field identification & locations

Identify by its characteristic pale violet color and glass-like appearance. It will scratch glass but cannot be scratched by a steel knife. Common locations include Brazil, Uruguay, and Namibia.

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