gemstone

Polished carnelian (orange chalcedony), possibly with an included mineral fragment

Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety

AI-generated identification · may be incorrect

Mohs hardness 6.5–7; translucent orange to red-orange, waxy to vitreous luster, cryptocrystalline quartz with no visible cleavage and conchoidal fracture. The dark gray protrusion appears to be a natural inclusion or attached matrix, though the image alone cannot confirm it.

Identified September 19, 2026More gemstone →

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At a glance

Common name: Polished carnelian (orange chalcedony), possibly with an included mineral fragment
Scientific name: Chalcedony, microcrystalline quartz (SiO₂), iron-colored variety
Category: gemstone
Identified: September 19, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a small polished piece; $30–$150+ for unusually large, vividly colored, natural specimens with attractive inclusions.

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

Forms when silica-rich groundwater fills cavities and fractures, with iron impurities producing orange-red coloration; commonly associated with volcanic rocks, generally forming during the host rock’s later alteration. Geological age varies widely.

Uses & applications

Used for beads, cabochons, carvings, seals, and ornamental objects; attractive polished pieces are collectible but usually modestly priced.

Geological facts

Carnelian is an orange-red variety of chalcedony; heating or dyeing can intensify its color. Natural color commonly shows uneven bands or cloudy zones.

Field identification & locations

Identify by its orange translucency, waxy polish, hardness, and inability to scratch with a steel knife; quartz should scratch glass. Common sources include India, Brazil, Uruguay, Madagascar, and Germany.