A six letter word for a rock or stone could be gravel, pebble, or rubble.
molten
lava
Lava.
pumice
genres
gneiss
Four letter word for stone is "Rock".
rock
Rock chisel
rock
6 Letter word starts with A is "Africa".
A 6 letter word for apportion is.....parcel
Beetle is a 6 letter word that has 'e' as the third letter.
A valuable rock is a gem.
stone