Crossword clues for the word: ALUMINA The word ALUMINA has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for ALUMINA Showing 1 to 7 of 7 results Clue(s) "Ruby, essentially" Bauxite component Earthy substance Old girl packing beginning to idly stuff in rubies, sapphires etc. Oxide found in clay Oxide found in rubies and sapphires Processed bauxite