What is the density of gypsum?
Gypsum has a density of approximately 2300 kg/m3.
Solid gypsum density is 2312 to 2322 kg/cubic meter or 2.312 to 2.322 g/cc. These are "as measured" values indicating some variation in the gypsum crystals. By the molecular formula, calcium sulfate with two water molecules should weigh 2.308 gm/cc. If not solid, then broken gypsum density ranges from 1290 to 1600 kg/m3.