Rock hard

This crossword clue is for the definition: Rock hard.
it’s A 9 letters crossword puzzle definition.
Next time, when searching for online help with your puzzle, try using the search term “Rock hard crossword” or “Rock hard crossword clue”. The possible answerss for Rock hard are listed below.

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Possible Answers: ORE [Hard rock].

Last seen on: NY Times Crossword 9 Feb 23, Thursday