and

big

block

boring

boulder

boulders

cobble

commodity

crystal

dead

durable

erosion

fossil

found

geological

geology

granite

gray

hard

heavy

inanimate

indestructible

landmark

layered

material

mined

mineral

mining

natural

nature

object

odd

paper

pebble

physical

piedra

piedras

resource

rock

rocks

rocky

rough

round

sand

sediment

solid

stock

stone

stones

training

ugly

unbreakable

value

video

weight