Below are possible answers for the crossword clue Mine hard substance.
4 letter answer(s) to mine hard substance
PITH
remove the pith from (a plant)
soft spongelike central cylinder of the stems of most flowering plants
the choicest or most essential or most vital part of some idea or experience; "the gist of the prosecutor's argument"; "the heart and soul of the Republican Party"; "the nub of the story"
Other crossword clues with similar answers to 'Mine hard substance'