mineral

Tumbled milky quartz (probable quartzite or chalcedony pebble)

Quartz, SiO₂; exact variety uncertain from the image

AI-generated identification · may be incorrect

Creamy white, opaque to slightly translucent, with a smooth water-worn or tumbled surface and subtle orange-brown iron-oxide staining. Quartz has Mohs hardness 7, vitreous-to-waxy luster, no cleavage, conchoidal fracture, and specific gravity about 2.65.

Identified August 16, 2026More mineral →

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At a glance

Common name: Tumbled milky quartz (probable quartzite or chalcedony pebble)
Scientific name: Quartz, SiO₂; exact variety uncertain from the image
Category: mineral
Identified: August 16, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a common tumbled or shaped piece; potentially $10–$30 if unusually large, attractive, or confirmed as a distinctive mineral variety.

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

Likely formed as quartz-rich vein material, quartzite, or chalcedony and later rounded by erosion or mechanical tumbling; the geological age cannot be determined visually. Iron-bearing fluids or surface weathering produced the orange staining.

Uses & applications

Common pieces are used as ornamental stones, lapidary material, carvings, and inexpensive collectibles; similar quartz is also used industrially for glass, ceramics, and silicon production.

Geological facts

The elongated pointed shape may indicate deliberate shaping rather than a naturally formed crystal. A steel file should not readily scratch it, while quartz or hardened steel can scratch glass.

Field identification & locations

Common in quartz-bearing rocks worldwide, including Brazil, Madagascar, the United States, and many river gravels; inspect for glass-like fracture and test hardness, but avoid destructive tests on valuable pieces.