sedimentary

Small rounded pebble, likely sandstone or weathered limestone

Indeterminate clastic carbonate/siliciclastic pebble; mineral composition appears dominated by quartz, feldspar, and/or calcite

AI-generated identification · may be incorrect

Pale tan, fine-grained, dull to slightly earthy luster, rounded and weathered; apparent hardness roughly 3–7 Mohs depending on whether calcite- or quartz-rich. No visible crystals or cleavage; subtle dark speckling may be iron-oxide or lithic grains.

Identified August 19, 2026More sedimentary →

Explore Small rounded pebble, likely sandstone or weathered limestone 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: Small rounded pebble, likely sandstone or weathered limestone
Scientific name: Indeterminate clastic carbonate/siliciclastic pebble; mineral composition appears dominated by quartz, feldspar, and/or calcite
Category: sedimentary
Identified: August 19, 2026
Method: Standard

AI Estimated Value

Usually less than $1; approximately $1–$5 only if unusually attractive, documented, or collected as part of a labeled geological set.

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 as sedimentary rock and later rounded by stream, beach, or glacial transport; its precise geological age and formation setting cannot be determined from the image.

Uses & applications

Primarily a common natural pebble with little commercial value; may be used decoratively, in crafts, or as a teaching specimen, but is unsuitable for reliable jewelry identification without testing.

Geological facts

The image shows a small stone resting on fabric, with no scale, surface test, or fresh break. A drop of dilute hydrochloric acid would fizz if calcite-rich limestone; quartz-rich sandstone would not.

Field identification & locations

Common in many gravel deposits worldwide; inspect a fresh surface with a hand lens, test hardness against glass, and check streak and acid reaction. Avoid confusing it with concrete or ceramic, which commonly show manufactured uniformity.