gemstone

Polished banded agate pendant

Agate, a microcrystalline variety of chalcedony (SiO₂)

AI-generated identification · may be incorrect

The oval pendant is translucent cream-yellow with a distinct curved band, waxy-to-glassy luster, and no visible cleavage; quartz hardness is about 6.5–7 Mohs, with specific gravity around 2.6. The metal setting and chain are human-made, but the pendant appears to be natural, polished stone.

Identified August 15, 2026More gemstone →

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Physical properties

Formation & geological history

Agate forms when silica-rich groundwater deposits successive layers of chalcedony in cavities, commonly in volcanic rocks. Its exact age cannot be determined visually; deposits occur from Precambrian to recent geological formations.

Uses & applications

Used for pendants, cabochons, beads, ornaments, and lapidary objects; agate is also used for small carvings and polishing tools.

Geological facts

The curved internal line likely reflects an agate growth band or healed cavity boundary. Yellow coloration may be natural iron staining, heat treatment, or dye, which cannot be confirmed from the photograph.

Field identification & locations

Identify agate by fine translucency, concentric or curved banding, waxy luster, and lack of visible crystal faces. Common sources include Brazil, Uruguay, Mexico, India, Madagascar, and the United States.