sedimentary
Gravel / Small Pebble
Rock Fragment (Gravel)
Hardness varies (typically 6-7 if quartz-based), dull earthy to sub-vitreous luster, irregular jagged to sub-rounded pebble shape, brownish-grey color, small millimeter-scale size.
Identified More sedimentary →
Explore Gravel / Small Pebble in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness varies (typically 6-7 if quartz-based), dull earthy to sub-vitreous luster, irregular jagged to sub-rounded pebble shape, brownish-grey color, small millimeter-scale size.
Formation & geological history
Formed through the mechanical weathering and breakdown of larger bedrock (igneous, sedimentary, or metamorphic), subsequently transported by wind, water, or gravity.
Uses & applications
Commonly used as construction aggregate, landscaping material, road base, and ballast.
Geological facts
Pebbles and gravel-sized fragments make up a huge portion of Earth's surface detritus and are the foundational elements for forming sedimentary conglomerate rocks.
Field identification & locations
Can be identified in the field by its small size, irregular shape, and grainy surface texture. Found virtually everywhere on Earth in soil, stream beds, and gravel pits.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Shale
Shale (clastic sedimentary rock)
sedimentary
Shale
Sedimentary Shale
sedimentary
Shale and Pebble Fragment
Sedimentary Rock (Mudstone/Shale with Silica Pebble)
sedimentary