gemstone

Yellow faceted gemstone, likely citrine

Citrine (yellow quartz, SiO₂); identification from the image is tentative

AI-generated identification · may be incorrect

Transparent golden-yellow, glassy luster, faceted cut; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage and conchoidal fracture. The pictured stone appears small and may be glass or another imitation, which cannot be ruled out visually.

Identified September 26, 2026More gemstone →

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Physical properties

Formation & geological history

Natural citrine forms when iron-bearing quartz is colored by geological heating and irradiation in pegmatites or hydrothermal veins; quartz deposits span many geological ages. Much commercial citrine is heat-treated amethyst.

Uses & applications

Used in jewelry and as a collectible gemstone; small faceted stones may also be used in craft jewelry.

Geological facts

Natural citrine is relatively uncommon; heat-treated amethyst can have a similar yellow-orange appearance.

Field identification & locations

Check hardness, inclusions, and refractive properties with gem-testing tools; visual inspection alone cannot confirm it is quartz. Citrine is commonly sourced from Brazil, Madagascar, and Uruguay.