gemstone

Polished heart-shaped blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂; chalcedony variety, possibly blue lace agate or dyed quartz

AI-generated identification · may be incorrect

Pale blue, translucent, with a waxy-to-glassy luster and no visible cleavage; hardness about 6.5–7 Mohs, trigonal quartz structure, specific gravity approximately 2.58–2.64. The heart cut and uniform color indicate human processing.

Identified September 13, 2026More gemstone →

Explore Polished heart-shaped blue chalcedony (likely dyed or treated) in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

At a glance

Common name: Polished heart-shaped blue chalcedony (likely dyed or treated)
Scientific name: Microcrystalline quartz, SiO₂; chalcedony variety, possibly blue lace agate or dyed quartz
Category: gemstone
Identified: September 13, 2026
Method: Standard

AI Estimated Value

Approximately $5–$30 for a small treated polished cabochon; $30–$100+ if natural, finely patterned, or high quality.

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

Chalcedony forms when silica-rich groundwater fills cavities and fractures, precipitating microcrystalline quartz, generally in volcanic rocks. Its geological age depends on the deposit; treatment or polishing is modern.

Uses & applications

Used as a jewelry cabochon, pendant, ornament, or gift stone; value is mainly decorative rather than industrial.

Geological facts

Blue chalcedony may be naturally colored by trace elements, but vivid or unusually uniform blue material is commonly dyed, irradiated, or coated. It can resemble blue glass or pale aquamarine.

Field identification & locations

Look for fine translucency, waxy luster, and absence of bubbles; a loupe may reveal dye concentration in cracks or around edges. Common sources include Brazil, Uruguay, India, Madagascar, and Turkey.