gemstone

Amethyst ring

Amethyst, purple quartz (SiO₂)

AI-generated identification · may be incorrect

Mohs hardness 7; purple coloration from iron-related defects and irradiation; vitreous luster, hexagonal crystal structure, and indistinct cleavage. The stone is faceted and set in a metal ring, so natural surface features are obscured.

Identified September 8, 2026More gemstone →

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Physical properties

Formation & geological history

Amethyst forms mainly in silica-rich volcanic cavities, where quartz crystallizes from hydrothermal fluids; many gem deposits are Mesozoic to younger. Common sources include Brazil, Uruguay, Zambia, and Namibia.

Uses & applications

Used as an affordable gemstone in rings and other jewelry, as well as in mineral collections and ornamental objects.

Geological facts

Color ranges from pale lilac to deep violet and may fade with prolonged heat or strong sunlight. Amethyst is the purple variety of quartz and is February’s birthstone.

Field identification & locations

Identify it by its purple color, glassy luster, hardness, and lack of obvious cleavage; glass and synthetic stones may look similar, so gemological testing is needed for certainty. The pictured stone appears to be amethyst, but exact identification cannot be confirmed from the image alone.