Quelle est la différence entre "pierre" et "caillou" et "roche" et …
caillou is the smallest (something like pebble) then pierre (rock, stone) then roche (rock, stone) then rocher (boulder) pierre and roche are particular, because they can also be used to designate a material. "cette maison est faite en pierre". "c'est de la roche". as highlighted by these sentences, Pierre can be used to talk about stone that ...