gemstone

Polished agate pendant (likely carnelian or plume agate)

Microcrystalline quartz, SiO₂ (chalcedony); exact variety cannot be confirmed from the image

AI-generated identification · may be incorrect

Polished, reddish-brown and white banded/translucent chalcedony with a glassy-to-waxy luster; quartz crystal structure, Mohs hardness 6.5–7, no obvious cleavage. The stone is mounted in a metal pendant.

Identified October 2, 2026More gemstone →

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At a glance

Common name: Polished agate pendant (likely carnelian or plume agate)
Scientific name: Microcrystalline quartz, SiO₂ (chalcedony); exact variety cannot be confirmed from the image
Category: gemstone
Identified: October 2, 2026
Method: Standard

AI Estimated Value

Approximately $10–$60 for a small, ordinary agate pendant; metal type, craftsmanship, and stone quality affect the price.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Agate forms as silica-rich fluids fill cavities and deposit chalcedony in successive layers, commonly in volcanic rocks. Its age depends on the host rock and locality, neither of which can be determined from the image.

Uses & applications

Used for jewelry and ornamental objects; durable enough for everyday wear, though the setting and chain may be less resistant to damage.

Geological facts

Agate’s fine bands or plume-like inclusions arise from variations in mineral deposition. The pictured pattern is consistent with agate but is not diagnostic of a specific variety.

Field identification & locations

Look for translucency, waxy luster, and curved or irregular internal bands; a gemological test or provenance is needed for a firm identification. Agates occur worldwide, especially in volcanic regions and river gravels.