pebbling
/ˈpɛb(ə)lɪŋ/ /ˈpɛblɪŋ/noun
1The action of treating leather with a roller to produce a rough or indented surface, as if impressed by pebbles; the pattern itself. Also in extended use: a similar texture or pattern on other surfaces.
2Pebbles used as paving; pebblestone.
Origin
Late 19th century; earliest use found in Edward H. Knight (1824–1883), patent lawyer and expert in mechanics. From pebble + -ing.