gemstone

Orange carnelian (likely)

Carnelian, orange chalcedony; microcrystalline quartz (SiO₂)

AI-generated identification · may be incorrect

Opaque to translucent orange with a waxy-to-vitreous luster; hardness 6.5–7 Mohs, trigonal quartz structure, no cleavage, conchoidal fracture. The small, roughly squared piece appears cut or chipped; identification from the photo is not definitive.

Identified October 13, 2026More gemstone →

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Physical properties

Formation & geological history

Forms when silica-rich fluids deposit chalcedony in cavities and veins, often in volcanic rocks; iron oxides impart its orange color. Deposits occur across many geological ages.

Uses & applications

Used for beads, cabochons, carvings, and ornamental objects; historically popular in seals and jewelry.

Geological facts

Carnelian is a variety of chalcedony, itself a microcrystalline form of quartz; heating can deepen its orange-red color.

Field identification & locations

Look for its orange hue, waxy surface, and hardness sufficient to scratch glass; common sources include India, Brazil, Uruguay, and Madagascar. Confirm with gemological testing, as orange glass or other minerals can look similar.