mineral

Polished pink chalcedony (likely pink agate/geode)

Microcrystalline quartz, SiO₂; chalcedony with iron-bearing inclusions and possible druzy quartz

AI-generated identification · may be incorrect

Hardness 6.5–7; translucent pink to mauve with tan/brown internal banding or brecciation; waxy to vitreous luster; cryptocrystalline quartz, with no visible cleavage and conchoidal fracture. Specific gravity is typically about 2.58–2.64.

Identified August 8, 2026More mineral →

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At a glance

Common name: Polished pink chalcedony (likely pink agate/geode)
Scientific name: Microcrystalline quartz, SiO₂; chalcedony with iron-bearing inclusions and possible druzy quartz
Category: mineral
Identified: August 8, 2026
Method: Standard

AI Estimated Value

Approximately $15–$60 for a common polished sphere; $75–$200+ if unusually large, strongly banded, natural-color, or exceptionally attractive.

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

Silica-rich groundwater filled cavities and fractures in volcanic rock, depositing chalcedony and quartz in layers; iron impurities produced the pink, tan, and brown colors. Such agate-forming deposits commonly range from Cenozoic to older volcanic ages.

Uses & applications

Polished spheres are used as decorative and lapidary objects, paperweights, and mineral-collection pieces; chalcedony is also used for cabochons, beads, carvings, and ornamental stone.

Geological facts

The specimen appears polished and may be a cut-and-filled agate or geode fragment rather than a naturally solid sphere. Color enhancement, dye, resin filling, or surface coating is possible and cannot be confirmed from the image.

Field identification & locations

Identify by its glassy/waxy polish, translucent quartz body, curved internal banding, and hardness sufficient to scratch ordinary glass. Common sources include Brazil, Uruguay, Madagascar, India, Mexico, and the United States.