sedimentary

Rounded pebble, likely sandstone or iron-stained quartzite

Unidentified clastic rock; composition cannot be determined from the image alone

AI-generated identification · may be incorrect

Small, rounded, opaque tan-brown pebble with a dull, earthy surface; grain size and mineral content are not clear. Hardness, cleavage, and specific gravity cannot be reliably assessed visually.

Identified September 26, 2026More sedimentary →

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Physical properties

Small, rounded, opaque tan-brown pebble with a dull, earthy surface; grain size and mineral content are not clear. Hardness, cleavage, and specific gravity cannot be reliably assessed visually.

Formation & geological history

Rounded by transport in water or by mechanical tumbling; the original rock may have formed much earlier from cemented sand or metamorphosed sandstone. Exact age and formation environment are unknown.

Uses & applications

Pebbles like this are commonly used for landscaping, garden paths, and decorative aggregates; this specimen has little individual market value.

Geological facts

Its smooth shape and rounded edges indicate abrasion during transport or tumbling, but appearance alone is insufficient to distinguish sandstone from quartzite or other brown rocks.

Field identification & locations

A close-up showing grain texture and a hardness or acid test would help identify it; compare whether it scratches glass and whether individual sand grains are visible. Similar pebbles occur in stream beds, beaches, and landscaping gravel.