mineral

Tumbled orange quartz (likely citrine or iron-stained quartz)

Quartz, silicon dioxide (SiO₂), possibly Fe³⁺-colored citrine

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent honey-orange color, vitreous luster, conchoidal fracture, and trigonal crystal structure. The rounded, polished form obscures natural crystal faces; internal fractures and inclusions are visible.

Identified September 14, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or igneous pegmatites; orange coloration may result from iron impurities or heat treatment of amethyst. Quartz ranges from Precambrian to modern formations.

Uses & applications

Used as a collectible mineral, lapidary material, and gemstone; high-quality citrine is cut for jewelry. Common commercial pieces are usually inexpensive.

Geological facts

Natural citrine is relatively uncommon, while much orange “citrine” is heat-treated amethyst. Color zoning, surface polish, and lack of distinct crystal faces suggest this specimen is tumbled or cut.

Field identification & locations

Common localities include Brazil, Uruguay, Madagascar, Spain, and the United States. Confirm identity with hardness testing, refractive index, and examination for amethyst-like zoning; orange chalcedony or glass are alternatives.