Gypsum (mineral)

Gypsum crystals, a selection of specimens of this crystallized mineral species. Gypsum is a mineral, here many collectibles presented with a description, one or more photos and sometimes a video. These gypsum crystals are for sale.
Gypsum is a calcium sulfate dihydrate, with the chemical formula CaSO₄-2H₂O, of the monoclinic crystal system.