sedimentary

Rounded brown-gray stone, possibly weathered conglomerate or sandstone

Indeterminate clastic sedimentary rock; likely poorly cemented sandstone/conglomerate

AI-generated identification · may be incorrect

Brown-gray, dull to earthy luster, rounded and strongly weathered surface; apparent granular texture but image detail is insufficient to confirm grains or pebbles. Estimated Mohs hardness 4–7, depending on cement and composition; cleavage absent and specific gravity roughly 2.2–2.7.

Identified August 8, 2026More sedimentary →

Explore Rounded brown-gray stone, possibly weathered conglomerate or sandstone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Rounded brown-gray stone, possibly weathered conglomerate or sandstone
Scientific name: Indeterminate clastic sedimentary rock; likely poorly cemented sandstone/conglomerate
Category: sedimentary
Identified: August 8, 2026
Method: Standard

AI Estimated Value

Usually $0–$10 as an ordinary stone; up to about $20–$50 if unusually shaped, polished, or locally collectible.

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 deposited sand and/or gravel later compacted and cemented, then rounded by erosion or abrasion. Its geological age and exact formation environment cannot be determined from the photograph.

Uses & applications

Common material has little commercial value, though suitable pieces may be used decoratively, in landscaping, or as curiosities; polished or distinctive specimens can have modest collector appeal.

Geological facts

The nearly symmetrical, rounded shapes may also reflect human shaping or tumbling rather than natural morphology. A fresh broken surface would reveal whether it is sandstone, conglomerate, or another material.

Field identification & locations

Test for visible grains, cement, and embedded pebbles with a hand lens; quartz-rich material may scratch glass, while calcite-rich rock fizzes with dilute hydrochloric acid. Common in riverbeds, beaches, alluvial deposits, and weathered outcrops.