mineral

Orange agate (chalcedony), possibly carnelian

Microcrystalline quartz, SiO₂; agate is banded chalcedony, while carnelian is orange chalcedony

AI-generated identification · may be incorrect

Orange-brown, waxy to vitreous luster; hardness about 6.5–7 Mohs; trigonal quartz structure, with no visible cleavage and a conchoidal fracture. The small specimen’s identity and properties cannot be confirmed from the image alone.

Identified October 13, 2026More mineral →

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Physical properties

Formation & geological history

Silica-rich fluids deposited quartz in cavities of volcanic rocks, commonly during the Cenozoic or earlier; iron impurities produce orange tones. Agate forms in many regions, including Brazil, Uruguay, India, and the western United States.

Uses & applications

Used for beads, cabochons, carvings, and ornamental objects; agate is also used in some precision and decorative applications.

Geological facts

Agate is often finely banded, though bands may be inconspicuous in a small or opaque piece. Carnelian is generally more uniformly colored orange to reddish brown.

Field identification & locations

Look for waxy luster, hardness near 7, and conchoidal fracture; translucency or fine banding supports identification. The photo lacks scale and detail, so exact identification is uncertain.