mineral

Orange chalcedony (possibly carnelian)

Microcrystalline quartz, SiO₂; carnelian is orange-red chalcedony colored mainly by iron oxides

AI-generated identification · may be incorrect

Small orange, opaque-to-translucent piece with a waxy to vitreous luster and irregular fracture; quartz hardness is 7 Mohs, trigonal crystal structure, and no cleavage. The image does not show enough detail to distinguish natural carnelian from another orange chalcedony or a treated piece.

Identified October 13, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids deposit microscopic quartz in cavities and fractures, often in volcanic rocks; iron impurities produce orange hues. Chalcedony occurs in rocks of many geological ages.

Uses & applications

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

Geological facts

Carnelian has been used in jewelry and seals since antiquity. Its color may be intensified by heating or dyeing.

Field identification & locations

Check for a smooth, waxy surface, hardness near 7, and conchoidal fracture; common sources include India, Brazil, Uruguay, and Madagascar. A photograph alone cannot confirm natural origin or treatment.