mineral

Rounded white pebble, likely quartz or feldspar

Most consistent with milky quartz (SiO₂), though altered feldspar or calcite is possible from the image

AI-generated identification · may be incorrect

White, opaque, smooth and water-rounded, with a dull to faintly vitreous luster; quartz hardness is Mohs 7, feldspar 6–6.5, and calcite 3. It appears massive rather than visibly crystalline and has no obvious cleavage.

Identified August 12, 2026More mineral →

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At a glance

Common name: Rounded white pebble, likely quartz or feldspar
Scientific name: Most consistent with milky quartz (SiO₂), though altered feldspar or calcite is possible from the image
Category: mineral
Identified: August 12, 2026
Method: Standard

AI Estimated Value

Typically $0.10–$2 for an ordinary pebble; up to about $5–$20 if unusually attractive, polished, or confirmed as a collectible 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 a naturally weathered and transported pebble from stream, beach, or gravel; the specimen’s geological age cannot be determined visually. Quartz pebbles commonly derive from erosion of older igneous or metamorphic rocks.

Uses & applications

Small pieces are used as inexpensive curiosities, craft material, or tumbling feed; quartz is also important in glass, electronics, and engineered stone. This individual pebble has minimal commercial value.

Geological facts

The rounded shape indicates abrasion during transport. A quartz identification can be tested with a steel nail or knife (quartz should resist scratching) and by checking for fizz with dilute acid to exclude calcite.

Field identification & locations

Common in river gravels, beaches, and glacial deposits worldwide; likely local material rather than a rare specimen. Confirm with hardness, streak (white), and a loupe examination for cleavage or translucent edges.