sedimentary
Rounded greenish pebble
Indeterminate; likely weathered quartzite, greenstone, or altered volcanic rock
AI-generated identification · may be incorrectFine-grained, dull to weakly earthy luster, olive-green to tan coloration, and smoothly water-worn shape; approximate hardness 5–7 Mohs, but composition cannot be confirmed visually. No visible crystals or cleavage.
Identified More sedimentary →
Explore Rounded greenish pebble in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Fine-grained, dull to weakly earthy luster, olive-green to tan coloration, and smoothly water-worn shape; approximate hardness 5–7 Mohs, but composition cannot be confirmed visually. No visible crystals or cleavage.
Formation & geological history
Probably a naturally rounded stream or beach cobble formed by prolonged abrasion; its exact geological age and parent rock are undetermined from the image.
Uses & applications
Primarily a curiosity, craft stone, or paperweight; not identifiable as a gem-quality material or building stone from this photograph.
Geological facts
The green color may reflect chlorite, epidote, serpentine, or altered iron-bearing minerals. Surface texture and lighting can also make ordinary sedimentary or volcanic pebbles appear green.
Field identification & locations
Test hardness against glass and a steel knife, inspect a fresh break for grains or layers, and use streak, magnetism, acid reaction, or professional microscopy for identification. Commonly found in gravel beds, rivers, and beaches.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sandstone
Arenite
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary