easy to find
where: just about anywhere, pathways, high tide lines
larger than sand, smaller than cobbles (scientifically speaking)
a pebble is a rock class size (0.16”-2.52”)
colloquially a pebble is quite small, but in geology rocks the size of your palm would also be considered a “pebble”
the material make-up has nothing to do with it
anything can be a pebble if you just give it enough time
river rock is included in the classification of pebbles (due to size yes, though in my opion they’re closer to cobble in size)
this is beacuase pebbles form through water erosion in rivers and along beaches.
a pebble from the ocean is going to be smoother due to the amount of consistent erosion via waves (though hitting against other rocks effects this)
beacuase of their light weight, they collect above the water line
uses:
pathways
walkways*
decoration
potting
low water gardens
sling shot ammo
...according to wikipedia a human use for pebbles is as a pet for a kid
ala zoe from sesame street
*(since they’re typically rounder they better suited for walkways than gravel)