KnowraGypsumLinked fromLinked fromThe 27 pages that link to Gypsum, each with the reason it gives.All 27Broader topic 9Related 14Narrower topic 1Compared with 3Calcium carbonateCompared with: It is another common calcium mineral, but contains sulfate rather than carbonate.CalciteCompared with: It can resemble pale calcite but is much softer and does not effervesce with dilute acid.AnhydriteCompared with: Gypsum is anhydrite's hydrated counterpart and is softer and less dense.