Crossword clues for the word: ZIRCONIA The word ZIRCONIA has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for ZIRCONIA Showing 1 to 5 of 5 results Clue(s) Compound used in abrasives Cubic ___ (gem) Cubic ___ (synthetic gemstone) Cubic stone? Metal oxide in dental crowns