Gypsum ore refers to natural deposits of the mineral gypsum, which is a soft sulfate mineral composed of calcium sulfate dihydrate. Gypsum ore is primarily composed of calcium sulfate dihydrate, which is a white or colorless mineral. It may also contain small amounts of impurities such as clay, shale, quartz, and calcite.

Gypsum is found in sedimentary rock formations, often associated with halite (rock salt), anhydrite, sulfur, calcite, and dolomite. It forms through the evaporation of shallow seas or saline lakes.

Gypsum ore is typically mined in open-pit or underground mines using conventional mining techniques. The ore is crushed, screened, and then heated to remove the water molecules (calcination) to produce calcium sulfate hemihydrate, which is then processed further into gypsum products.

Gypsum ore is an important mineral resource used widely in construction, agriculture, and industry. Its versatility, ease of processing, and beneficial properties make it a valuable commodity globally.