mineral

Tumbled brown mineral pebble, possibly jasper or weathered quartzite

Indeterminate from the blurred image; likely microcrystalline quartz (SiO₂) if jasper, or quartzite dominated by quartz

AI-generated identification · may be incorrect

Brown, opaque to weakly translucent, with a dull-to-waxy luster and irregular rounded shape; quartz-bearing material is typically Mohs hardness 6.5–7, with no obvious cleavage and a granular or cryptocrystalline texture.

Identified August 14, 2026More mineral →

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At a glance

Common name: Tumbled brown mineral pebble, possibly jasper or weathered quartzite
Scientific name: Indeterminate from the blurred image; likely microcrystalline quartz (SiO₂) if jasper, or quartzite dominated by quartz
Category: mineral
Identified: August 14, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a common tumbled pebble; $10–$50 if unusually patterned, translucent, or sold as a quality cabochon.

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

Jasper forms when silica-rich groundwater replaces or fills sedimentary/volcanic material; quartzite forms when quartz sandstone is metamorphosed. Ages vary widely, from Precambrian to recent, depending on source rock.

Uses & applications

Commonly used as tumbled stones, cabochons, carvings, and decorative aggregate; modest jewelry and collecting value.

Geological facts

The image is too low-resolution for a confident species-level identification; color alone cannot distinguish jasper, quartzite, iron-stained quartz, or another brown silicate.

Field identification & locations

Check for hardness by testing glass, inspect fracture rather than cleavage, and look for fine grain or quartz sparkle; a streak test, translucency, and magnification would help. Similar material occurs worldwide in silica-rich gravels and metamorphic terrains.