Most people associate gypsum ceiling tiles with the ugly drop ceilings of the 60, 70s, and 80s, which usually consisted of lightweight square tiles set into a metal framework. More recently ...

A World of Gypsum, from Ancient Greece to 19th Century Paris. Calcium sulfate dihydrate (CaSO 4 ·2H 2 O) acquired the name of “gypsum” thanks to the Ancient Greeks, who used a material they ...