gemstone

Tumbled citrine quartz

Quartz, silicon dioxide (SiO₂), yellow variety commonly called citrine

AI-generated identification · may be incorrect

Mohs hardness 7; transparent to translucent yellow, honey, and orange coloration; vitreous luster; trigonal crystal structure; no cleavage and conchoidal fracture. The rounded shape indicates tumbling or natural abrasion, with internal fractures and cloudy inclusions visible.

Identified September 12, 2026More gemstone →

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Physical properties

Formation & geological history

Citrine forms when iron impurities color quartz, commonly through heating of amethyst or smoky quartz in nature or commercially. Quartz crystallized in hydrothermal veins and igneous cavities throughout geological time, commonly in granitic pegmatites and geodes.

Uses & applications

Used as an ornamental and jewelry gemstone, especially in cabochons, beads, and faceted stones. Small tumbled pieces are popular for collecting and décor.

Geological facts

Natural citrine is relatively uncommon; much commercial citrine is heat-treated amethyst. Strong orange-brown material may be marketed as Madeira citrine.

Field identification & locations

Identify it by its glassy luster, hardness, conchoidal fracture, and yellow color; it should scratch glass but not be scratched by steel. Common sources include Brazil, Madagascar, Spain, Uruguay, and Zambia.