The California spiny lobster (Panulirus interruptus) is a species of spiny lobster found in the eastern Pacific Ocean from Monterey Bay, California to the Gulf of Tehuantepec, Mexico.
The word gypsum is derived from the Greek word Î³ÏÏÎ¿Ï (gypsos), plaster. Because the quarries of the Montmartre district of Paris have long furnished burnt gypsum (calcined gypsum) used for various purposes, this dehydrated gypsum became known as plaster of Paris.
For priming flexible canvas, an emulsion of gesso and linseed oil, also called half-chalk ground, is used. In geology, the Italian gesso corresponds to the English gypsum, as it is a calcium sulfate mineral (CaSO 4 Â·2H 2 O).