gemstone

Faceted yellow gemstone, likely citrine

Quartz (SiO₂); identification is uncertain from the image alone

AI-generated identification · may be incorrect

Transparent golden-yellow, vitreous luster, with faceted surfaces; quartz has Mohs hardness 7 and a trigonal crystal structure, with no true cleavage. The image does not establish whether this is natural citrine or treated amethyst/quartz.

Identified October 3, 2026More gemstone →

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Physical properties

Formation & geological history

Citrine forms when silica-rich fluids crystallize in cavities, commonly in granitic rocks and pegmatites; natural deposits span many geological ages. Much commercial citrine is heat-treated amethyst.

Uses & applications

Used in jewelry and as a collectible; this small faceted stone may be set in a ring or pendant.

Geological facts

Citrine’s yellow color is associated with trace iron and irradiation or heating. A uniformly rich orange-yellow color can indicate heat treatment.

Field identification & locations

Quartz is relatively hard and lacks cleavage; confirm identity with gemological testing, since color and faceting alone cannot distinguish citrine from glass or other yellow gems. Citrine is found notably in Brazil, Madagascar, and Zambia.