Pearl's outer covering crossword clue

Hello crossword solvers! Today let's find the answer to the clue Pearl's outer covering from the USA Today crossword. After we've gathered any other hints from the USA Today crossword puzzle and all possible helpful and relevant information from other sources, we are ready to solve the clue Pearl's outer covering. The answer we found for the clue Pearl's outer covering is:

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The answer has 5 letters: NACRE

Last usage in USA Today crossword puzzle.