gemstone

Faceted purple gemstone, possibly amethyst

Likely quartz (SiO₂), variety amethyst; identification is uncertain from the image

AI-generated identification · may be incorrect

Small, oval faceted, deep-purple stone with a vitreous luster. If amethyst, hardness is 7 Mohs and its crystals are trigonal; the image does not establish whether this is natural or synthetic.

Identified October 3, 2026More gemstone →

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Physical properties

Small, oval faceted, deep-purple stone with a vitreous luster. If amethyst, hardness is 7 Mohs and its crystals are trigonal; the image does not establish whether this is natural or synthetic.

Formation & geological history

Natural amethyst forms in silica-rich fluids, commonly lining volcanic-rock cavities; deposits range in age and occur in many geological settings. The pictured cut stone cannot be dated or sourced visually.

Uses & applications

Used in jewelry and as a collectible gemstone; amethyst is also popular for decorative carvings.

Geological facts

Amethyst’s purple color is associated with trace iron and natural irradiation; heat treatment can alter its color.

Field identification & locations

Check for natural color zoning, inclusions, and gemological properties; a jeweler or gem lab can distinguish amethyst from glass or synthetic stones. Common sources include Brazil, Uruguay, and Zambia.