igneous
Small rounded pebble, likely granite or granitic gneiss
Granitoid rock; exact identification is uncertain from the photograph
AI-generated identification · may be incorrectSpeckled brown-gray with a darker gray patch and a granular appearance. Likely quartz and feldspar with dark mica or amphibole; individual grains are too small to assess reliably. Typical granite hardness is about 6–7 Mohs, with a crystalline texture and no distinct cleavage as a whole rock.
Identified More igneous →
Explore Small rounded pebble, likely granite or granitic gneiss in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Speckled brown-gray with a darker gray patch and a granular appearance. Likely quartz and feldspar with dark mica or amphibole; individual grains are too small to assess reliably. Typical granite hardness is about 6–7 Mohs, with a crystalline texture and no distinct cleavage as a whole rock.
Formation & geological history
Likely formed by slow cooling of silica-rich magma deep underground, potentially followed by weathering and stream or beach transport that rounded it. Granitoid rocks range widely in age, from ancient Precambrian to recent geological periods.
Uses & applications
Small pebbles are mainly collected or used decoratively; granite is widely used as building and dimension stone.
Geological facts
The image shows a tiny, rounded specimen, so a precise rock identification is not possible from appearance alone.
Field identification & locations
A speckled, interlocking mix of light and dark mineral grains supports a granite-like identification; a fresh broken surface or magnification would help distinguish granite from gneiss and other rocks. Granitoids are common in continental crust worldwide.
