gemstone

Red banded agate bead (likely carnelian or dyed agate)

Microcrystalline quartz, SiO₂ (chalcedony/agate variety)

AI-generated identification · may be incorrect

Small polished spherical bead with reddish-orange color and pale curved bands; waxy to vitreous luster, no visible crystal faces, and conchoidal fracture if broken. Hardness about 6.5–7 Mohs; specific gravity approximately 2.6.

Identified September 20, 2026More gemstone →

Explore Red banded agate bead (likely carnelian or dyed agate) in the encyclopedia →

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Physical properties

Formation & geological history

Agate forms when silica-rich groundwater fills cavities in volcanic rock, depositing successive layers of chalcedony over long periods, commonly during the Cenozoic or older volcanic episodes. The sphere is human-cut and polished; color enhancement by dyeing is possible.

Uses & applications

Used for beads, cabochons, carvings, ornaments, and inexpensive jewelry; agate is also used for burnishing tools and decorative stonework.

Geological facts

The curved white bands are characteristic of agate/chalcedony, though the image alone cannot confirm natural versus dyed color or distinguish it confidently from red jasper.

Field identification & locations

Test cautiously with a steel file or quartz: genuine agate resists steel and can scratch glass, while glass-like imitations may show bubbles. Common sources include Brazil, Uruguay, India, Madagascar, and Mexico.