hardrock

About 0.03 uses per million words.

Meaning

1. noun Rock containing ore from which minerals are extracted.
2. noun Solid, nonporous rock.
3. noun A type of concrete that contains relatively small amounts of aggregate relative to the amount of cement.
4. noun An unregenerate criminal; a bully boy.

Similar words

anorthosite wollastonite lode metallogenic gossan pyroxenite mineral lateritic metalliferous igneous rock

Often followed by

mining miners mines minerals miner and mineral mine areas