Other crossword clues for answer "HARDEST"HARDESTAt the top of the Mohs scaleLike Saturday puzzles10, on the Mohs scaleMost demandingTops in toughnessMost difficultMost challenging^HARDESMost challengingThe ultimate in knotsMost arduousAdjective for a diamond.Like diamond.Most laborious.Steeliest.Most adamantMost unyieldingAdjective for diamondLike diamond, on the Mohs scaleMost effortfulLeast malleableThe most difficultMohs scale meaning of 10Adjective for diamondsRating a 10 on the Mohs scale