gemstone

Polished yellow-orange chalcedony (likely carnelian)

Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety commonly called carnelian

AI-generated identification · may be incorrect

Hardness 6.5–7 Mohs; translucent honey-yellow to orange, with waxy-to-glassy luster and no visible cleavage. The rounded, polished form obscures crystal structure; specific gravity is about 2.6.

Identified August 7, 2026More gemstone →

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At a glance

Common name: Polished yellow-orange chalcedony (likely carnelian)
Scientific name: Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety commonly called carnelian
Category: gemstone
Identified: August 7, 2026
Method: Standard

AI Estimated Value

Approximately $2–$15 for a small polished pebble; $20–$100+ for larger, vividly colored, highly translucent material.

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

Hardness 6.5–7 Mohs; translucent honey-yellow to orange, with waxy-to-glassy luster and no visible cleavage. The rounded, polished form obscures crystal structure; specific gravity is about 2.6.

Formation & geological history

Forms when silica-rich groundwater fills cavities and fractures in volcanic rocks, with iron oxides producing orange coloration. Chalcedony deposits range from ancient volcanic terrains to younger sedimentary settings.

Uses & applications

Used for cabochons, beads, carvings, tumbled stones, and ornamental objects; durable but generally inexpensive unless strongly colored and translucent.

Geological facts

Carnelian is traditionally associated with vitality and has been used in seals, amulets, and jewelry since antiquity. The specimen could also be yellow chalcedony rather than true red-orange carnelian.

Field identification & locations

Identify by its smooth waxy appearance, lack of cleavage, conchoidal fracture, and inability to scratch with a steel knife while scratching glass. Common sources include India, Brazil, Uruguay, Madagascar, and the United States.