sedimentary

Weathered sandstone pebble

Quartz-rich sandstone, predominantly SiO₂ grains cemented by silica, iron oxides, or carbonate

AI-generated identification · may be incorrect

Hardness roughly 6–7 for quartz grains; tan to reddish-brown, earthy, and granular with a dull to slightly sparkly luster. Visible sand-sized grains and rounded edges indicate abrasion and weathering; bedding is not obvious in this small specimen.

Identified August 15, 2026More sedimentary →

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At a glance

Common name: Weathered sandstone pebble
Scientific name: Quartz-rich sandstone, predominantly SiO₂ grains cemented by silica, iron oxides, or carbonate
Category: sedimentary
Identified: August 15, 2026
Method: Standard

AI Estimated Value

Typically $0–$5 as a common loose pebble; perhaps $5–$20 if unusually attractive, locality-specific, or part of a curated collection.

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

Formed when sand accumulated, compacted, and cemented into rock, commonly in rivers, beaches, dunes, or shallow marine settings. Its exact geological age cannot be determined from the image; the rounded shape likely reflects later transport.

Uses & applications

Used as building stone, paving, aggregate, and a source of silica; attractive pieces may be collected or used decoratively, but this specimen has little commercial value.

Geological facts

Iron-oxide staining commonly produces the yellow, orange, and reddish colors. Sandstone properties vary greatly depending on cement type and grain composition.

Field identification & locations

Identify it by its gritty texture, visible interlocking sand grains, lack of glassy conchoidal fracture, and ability to scratch softer materials; a hand lens and dilute acid test can help distinguish carbonate cement. Common worldwide, especially in sedimentary basins, riverbeds, beaches, and desert regions.