gemstone

Amethyst stud earrings

Amethyst, purple quartz (SiO₂)

AI-generated identification · may be incorrect

The small faceted purple stones appear to be amethyst set in gold-colored metal; the image does not establish whether the metal is solid gold. Amethyst has Mohs hardness 7, vitreous luster, and a trigonal crystal structure; cut stones do not show natural cleavage.

Identified October 3, 2026More gemstone →

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Physical properties

Formation & geological history

Amethyst forms when iron-bearing quartz crystallizes in silica-rich cavities, commonly in volcanic rocks. Deposits occur in Brazil, Uruguay, Zambia, and elsewhere; the stones’ age and source cannot be determined from the image.

Uses & applications

Used primarily in jewelry and as a collectible gemstone.

Geological facts

Amethyst’s purple color is associated with trace iron and natural or heat-related irradiation effects.

Field identification & locations

Faceted violet color and quartz-like brilliance are consistent with amethyst, though visual identification alone cannot confirm the stone or detect treatments. Similar-looking glass or synthetic quartz may require gemological testing.