一枚岩[ichimaiiwa] monolith
火山岩[kazangan] volcanic rock
火成岩[kaseigan] igneous rock
かこう岩[kakougan] granite
岩塩[ganen] halite

岩屋[iwaya] cavern
岩角[iwakado] edge or corner of a stone
岩間[iwama] among rocks
岩山[iwayama] rocky mountain

瓦礫[gareki] rubble
砂礫[sareki] pebbles
紙礫[kamitsubute] paper pellet
梨の礫[nashinotsubute] not getting a reply
飛礫[tsubute] stone thrown at somebody

礫岩[rekigan] conglomerate stone
火山礫[kazanreki] lapilli
雪礫[yukitsubute] snowball
闇夜の礫[yamiyonotsubute] aimless attempt