gemstone

Red agate-style bead earring

Likely dyed chalcedony (microcrystalline quartz, SiO₂); exact material cannot be confirmed visually

AI-generated identification · may be incorrect

Polished, translucent red bead with a glassy to waxy luster; quartz hardness is 6.5–7 Mohs, trigonal crystal system, and no cleavage. The metal hook is not geological material.

Identified October 3, 2026More gemstone →

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Physical properties

Polished, translucent red bead with a glassy to waxy luster; quartz hardness is 6.5–7 Mohs, trigonal crystal system, and no cleavage. The metal hook is not geological material.

Formation & geological history

If chalcedony, it formed as silica deposited in rock cavities, commonly in volcanic rocks; agate deposits range from ancient to recent geological ages. The bright, uniform color may result from dyeing.

Uses & applications

Beads and jewelry; agate is also used for ornaments, carvings, and small decorative objects.

Geological facts

Chalcedony is a microcrystalline variety of quartz, and agate is its banded form; a smooth red bead alone is not enough to distinguish natural, dyed stone from glass or another material.

Field identification & locations

Look for subtle internal bands, inclusions, or uneven color under magnification; glass may show bubbles, while dye can concentrate in cracks. Agate is found worldwide, including Brazil, Uruguay, India, and the United States.