mineral

Orange chalcedony (carnelian-like), possibly iron-stained quartz

Microcrystalline quartz, SiO₂ (chalcedony); orange coloration likely from iron oxides/hydroxides

AI-generated identification · may be incorrect

Hardness about 6.5–7 Mohs; orange-yellow to reddish-brown, waxy to vitreous luster, translucent edges, and no visible cleavage. The uneven granular surface and rounded shape suggest a natural or lightly tumbled silica-rich specimen.

Identified August 28, 2026More mineral →

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At a glance

Common name: Orange chalcedony (carnelian-like), possibly iron-stained quartz
Scientific name: Microcrystalline quartz, SiO₂ (chalcedony); orange coloration likely from iron oxides/hydroxides
Category: mineral
Identified: August 28, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a small rough piece; $10–$50 if unusually translucent, vividly colored, or suitable for cutting.

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, depositing chalcedony during cooling and weathering; iron compounds create the orange-red hues. Chalcedony occurs from Precambrian to recent deposits in volcanic and sedimentary environments.

Uses & applications

Used for beads, cabochons, carvings, ornamental objects, and lapidary practice; less commonly used as aggregate or silica material. Small common pieces generally have modest collecting value.

Geological facts

Carnelian is the orange-red variety of chalcedony, while paler orange material may be called sard or orange chalcedony. Color can deepen with heating or prolonged exposure to iron-rich solutions.

Field identification & locations

Look for waxy luster, translucency, conchoidal fracture, and inability to scratch it with a steel knife; it should scratch glass. Common sources include India, Brazil, Uruguay, Madagascar, and the western United States.