mineral

Small rounded mineral pebble, possibly feldspar or quartz

Uncertain from image; likely a quartz- or feldspar-rich grain

AI-generated identification · may be incorrect

Tan-brown, opaque to translucent, rounded and weathered, with a dull to slightly vitreous luster; hardness likely about 6–7 Mohs if quartz/feldspar. Crystal structure and cleavage cannot be confirmed at this size and resolution.

Identified August 30, 2026More mineral →

Explore Small rounded mineral pebble, possibly feldspar or quartz in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Likely a naturally weathered fragment produced by erosion of an igneous or metamorphic rock; its geological age cannot be determined visually. The rounded form may reflect transport in stream or beach sediment.

Uses & applications

Primarily a curiosity or teaching specimen; too small and indistinct for practical industrial or jewelry use. Value is generally negligible unless laboratory testing reveals an uncommon mineral or gem material.

Geological facts

The visible brown coloration may come from iron-oxide staining or surface alteration. A scratch test, streak test, hardness test, and examination under magnification would substantially improve identification.

Field identification & locations

Commonly found in stream gravels, soils, beaches, and crushed-rock deposits. Quartz should not be scratched by a steel knife, while feldspar commonly shows cleavage and can be scratched by hardened steel.