mineral

Polished quartz-rich pebble, possibly milky quartz with a dark mineral band

Quartz (SiO₂), with an unidentified dark inclusion or attached matrix

AI-generated identification · may be incorrect

Opaque to slightly translucent cream-white body with a smooth, polished surface and a dark gray-black patch; quartz has Mohs hardness 7, a vitreous to waxy luster, and no cleavage. The dark portion cannot be identified reliably from the image.

Identified October 4, 2026More mineral →

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At a glance

Common name: Polished quartz-rich pebble, possibly milky quartz with a dark mineral band
Scientific name: Quartz (SiO₂), with an unidentified dark inclusion or attached matrix
Category: mineral
Identified: October 4, 2026
Method: Standard

AI Estimated Value

About $2–$15 for a small polished specimen; higher value would require a distinctive confirmed inclusion or provenance.

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 a natural pebble shaped by abrasion and later polished; quartz commonly forms in veins and many rock types over a wide range of geological ages. The specimen’s exact source and age are not determinable visually.

Uses & applications

Suitable for collecting or display; quartz is also widely used in glassmaking, electronics, and jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and occurs in many colors and forms.

Field identification & locations

The pale, hard, glassy-looking body and lack of obvious cleavage are consistent with quartz; a scratch test or closer examination of the dark area would help confirm identification. Quartz is common worldwide.