gemstone

Green agate (likely dyed), used as jewelry beads

Microcrystalline quartz, SiO₂ (chalcedony; agate variety)

AI-generated identification · may be incorrect

Likely polished, irregular green beads with a waxy-to-vitreous luster; quartz hardness 6.5–7, trigonal crystal structure, specific gravity about 2.6. The image does not show diagnostic banding, and the color may be enhanced by dye.

Identified October 10, 2026More gemstone →

Explore Green agate (likely dyed), used as jewelry beads in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Agate forms as silica-rich fluids fill cavities in volcanic rock and deposit concentric or layered chalcedony over time; deposits span many geological ages. Green beads may be dyed after cutting and polishing.

Uses & applications

Used in beads, pendants, and other jewelry; agate is also used for carvings and decorative objects.

Geological facts

Agate is a banded variety of chalcedony, though bands may be subtle or absent in small bead material.

Field identification & locations

Green color and bead shape alone cannot confirm agate; inspect for fine banding and, where appropriate, test hardness on an inconspicuous surface. Agate occurs worldwide, notably in Brazil, Uruguay, India, and the United States.