igneous
Small rounded pebble, likely quartz-rich sandstone or granitic fragment
Indeterminate lithic clast; possible quartz–feldspar aggregate
AI-generated identification · may be incorrectTan, rounded, granular surface with dull to weakly sparkling luster; apparent hardness about 6–7 Mohs if quartz-rich. Individual grains and composition are too indistinct for a definitive identification from this image.
Identified More igneous →
Explore Small rounded pebble, likely quartz-rich sandstone or granitic fragment in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Tan, rounded, granular surface with dull to weakly sparkling luster; apparent hardness about 6–7 Mohs if quartz-rich. Individual grains and composition are too indistinct for a definitive identification from this image.
Formation & geological history
Likely a naturally weathered and water-rounded sedimentary or igneous fragment; geological age cannot be determined visually. The smooth shape indicates transport by stream, beach, or glacial action.
Uses & applications
Primarily a common natural pebble or teaching/collecting specimen; no significant commercial value unless testing reveals an unusual mineral or provenance.
Geological facts
The visible grains suggest a quartz-bearing material rather than a single crystal. A close photograph, streak test, hardness test, and acid test would improve identification.
Field identification & locations
Look for visible quartz grains, feldspar, mica, layering, or reaction to dilute hydrochloric acid; a magnet test may detect iron minerals. Common source rocks include granite-derived gravels and quartz-rich sandstones worldwide.
