sedimentary

Rounded brown pebble, likely quartz-rich sandstone or weathered quartzite

Indeterminate; probable quartz (SiO₂)-rich sandstone/quartzite with iron-oxide staining

AI-generated identification · may be incorrect

Brown, fine-grained, dull to weakly earthy luster, smoothly water-worn, with no visible crystals or cleavage. Estimated hardness about 6–7 if quartz-rich; specific gravity roughly 2.5–2.7. The image cannot distinguish sandstone from quartzite confidently.

Identified August 10, 2026More sedimentary →

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At a glance

Common name: Rounded brown pebble, likely quartz-rich sandstone or weathered quartzite
Scientific name: Indeterminate; probable quartz (SiO₂)-rich sandstone/quartzite with iron-oxide staining
Category: sedimentary
Identified: August 10, 2026
Method: Standard

AI Estimated Value

Typically $0–$5 as an ordinary pebble; perhaps $5–$20 if unusually attractive, documented, or polished.

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 from cemented quartz sand, then rounded by stream or beach transport; if quartzite, it was subsequently metamorphosed. Iron oxides produce the brown coloration. Age is indeterminate from the photograph.

Uses & applications

Usually a common geological pebble with negligible commercial value; suitable for teaching, landscaping, or a small collection, but not normally jewelry-grade.

Geological facts

The smooth shape indicates abrasion during transport or prolonged weathering. The reported Moroccan location is compatible with abundant sedimentary rocks and transported quartz-rich pebbles.

Field identification & locations

Test a fresh edge: weak fizz with dilute hydrochloric acid would indicate calcite-rich sandstone or limestone, while no fizz and scratching glass suggest quartz-rich material. A hand lens and streak test would improve identification.