mineral

Orange chalcedony (likely carnelian)

Chalcedony, microcrystalline quartz (SiO₂); orange-red variety is called carnelian

AI-generated identification · may be incorrect

Appears rounded and opaque to slightly translucent, with orange-brown color and a dull-to-waxy luster. Quartz hardness is about 7 Mohs; crystals are microscopic and the specimen has no visible cleavage.

Identified October 10, 2026More mineral →

Explore Orange chalcedony (likely carnelian) in the encyclopedia →

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Physical properties

Formation & geological history

Forms as silica-rich groundwater deposits quartz in cavities and fractures, often in volcanic rocks. The image cannot establish its geological age or exact origin.

Uses & applications

Used for beads, cabochons, carvings, and ornamental objects; small rough pieces are mainly collected or used in crafts.

Geological facts

Carnelian’s color commonly comes from iron impurities. A photo alone cannot confirm that this orange specimen is chalcedony rather than another orange mineral.

Field identification & locations

Look for a waxy surface, conchoidal fracture, and hardness sufficient to scratch glass; avoid destructive tests on a valued piece. Chalcedony occurs worldwide, including Brazil, India, Madagascar, and the western United States.