mineral

White tumbled stone, possibly quartz or marble

Unidentified; appearance alone cannot distinguish quartz (SiO₂) from calcite-rich marble (CaCO₃).

AI-generated identification · may be incorrect

Small, rounded, opaque white piece with a matte-to-satin surface; hardness and crystal structure cannot be determined from the image. Quartz is Mohs 7; calcite marble is typically Mohs 3.

Identified September 26, 2026More mineral →

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At a glance

Common name: White tumbled stone, possibly quartz or marble
Scientific name: Unidentified; appearance alone cannot distinguish quartz (SiO₂) from calcite-rich marble (CaCO₃).
Category: mineral
Identified: September 26, 2026
Method: Standard

AI Estimated Value

About $0.10–$3 as a small common tumbled stone; higher value is unlikely without a confirmed identity or notable quality.

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

Small, rounded, opaque white piece with a matte-to-satin surface; hardness and crystal structure cannot be determined from the image. Quartz is Mohs 7; calcite marble is typically Mohs 3.

Formation & geological history

Likely a naturally occurring stone that has been shaped or tumbled; its specific formation process and age are unknown without testing.

Uses & applications

Small polished stones are used for crafts, decoration, and collecting; no specific industrial use can be assigned from this image.

Geological facts

A scratch test and dilute acid test can help distinguish quartz from calcite, but may damage the specimen.

Field identification & locations

The rounded outline and pale, fine-grained appearance are visible clues, but identification requires closer inspection or testing. White quartz and marble occur worldwide.