gemstone

Likely citrine pendant

Quartz, silicon dioxide (SiO₂), probably heat-treated amethyst or smoky quartz

AI-generated identification · may be incorrect

The central stone is transparent yellow-orange with vitreous luster and faceted geometry; quartz has Mohs hardness 7, hexagonal crystal structure, no prominent cleavage, and specific gravity about 2.65. The surrounding small stones appear to be pale quartz or possibly glass;…

Identified August 13, 2026More gemstone →

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Physical properties

Formation & geological history

Natural citrine forms when iron-bearing quartz crystallizes in hydrothermal veins or cavities, commonly in granitic and metamorphic environments; many commercial citrines are heat-treated amethyst. Quartz deposits range from Precambrian to recent geologic ages.

Uses & applications

Used in jewelry and ornamental pendants; attractive natural citrine is collectible, while common heat-treated material is widely marketed as a jewelry gemstone.

Geological facts

Citrine is the yellow variety of quartz and is relatively uncommon naturally compared with purple amethyst. Strong yellow-orange color in inexpensive jewelry often indicates heat treatment.

Field identification & locations

Common sources include Brazil, Madagascar, Zambia, Uruguay, and Spain. Check for quartz-like hardness, refractive sparkle, and inclusions; gemological testing or spectroscopy is needed to distinguish natural from treated citrine and glass.