gemstone

Red agate bead (likely dyed or treated)

Agate, a microcrystalline variety of quartz; SiO₂

AI-generated identification · may be incorrect

The image shows a small, polished red bead with a central drilled hole; hardness about 6.5–7 Mohs and vitreous to waxy luster. Its color may be enhanced; crystal structure is trigonal, with no visible cleavage.

Identified October 3, 2026More gemstone →

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Physical properties

Formation & geological history

Agate forms as silica-rich fluids fill cavities in volcanic rocks, depositing chalcedony in layers. The bead’s geological age cannot be determined from the image; shaping and drilling are human-made.

Uses & applications

Used in jewelry, beadwork, and decorative crafts; agate is also used for ornamental objects and precision components.

Geological facts

Agate is made of extremely fine quartz crystals and often displays distinctive bands, though none are apparent on this bead.

Field identification & locations

A drilled, glossy bead is consistent with worked agate, but appearance alone cannot confirm the material or treatment; glass and other materials can look similar. Agate occurs worldwide, notably in Brazil, Uruguay, India, and the United States.