mineral

Tumbled pink chalcedony (likely rose quartz or pink agate)

Chalcedony, microcrystalline quartz (SiO₂); exact variety is uncertain from the image

AI-generated identification · may be incorrect

Hardness about 7 Mohs; translucent to opaque pink, with a waxy-to-glassy luster and no visible cleavage. The smooth rounded surface indicates tumbling and polishing; color may come from iron, manganese, or microscopic inclusions.

Identified September 15, 2026More mineral →

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At a glance

Common name: Tumbled pink chalcedony (likely rose quartz or pink agate)
Scientific name: Chalcedony, microcrystalline quartz (SiO₂); exact variety is uncertain from the image
Category: mineral
Identified: September 15, 2026
Method: Standard

AI Estimated Value

Approximately $2–$15 for a small tumbled stone; $20–$100+ for larger, unusually translucent or naturally vivid specimens.

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, precipitating microscopic quartz fibers; related deposits range from Precambrian to younger volcanic-hosted formations. Rose quartz is typically massive quartz, while pink chalcedony/agate is cryptocrystalline.

Uses & applications

Used as a lapidary stone, cabochon, bead, ornament, and inexpensive jewelry material. Common tumbled pieces generally have modest collector value.

Geological facts

Pink chalcedony can resemble dyed quartz, common glass, or resin; natural material usually feels cool and is substantially harder than glass or plastic. Strong color zoning or translucency may indicate agate.

Field identification & locations

Commonly found in Brazil, Madagascar, India, Uruguay, Namibia, and the United States. Identify with a hardness test only on an inconspicuous area: quartz should scratch ordinary glass, while reputable testing is preferable for a polished piece.