mineral

Orange chalcedony (likely carnelian)

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

AI-generated identification · may be incorrect

Usually hardness 6.5–7 Mohs, waxy to vitreous luster, translucent to opaque, and no visible crystals or cleavage. The specimen appears rounded and orange, but image alone cannot confirm its identity or whether it is naturally colored.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Silica-rich fluids deposit microscopic quartz in cavities and fractures, often in volcanic rocks; iron oxides impart orange hues. Chalcedony forms across many geologic ages.

Uses & applications

Used for beads, cabochons, carvings, and ornamental objects; also collected as a mineral specimen.

Geological facts

Carnelian is a traditional name for orange to reddish chalcedony and has been used for seals and jewelry since antiquity.

Field identification & locations

Look for a waxy luster, conchoidal fracture, and translucence at thin edges; common sources include India, Brazil, Uruguay, and Madagascar. A hardness or gemological test would help distinguish it from other orange materials.