Gypsum

[Sarah]

A mineral consisting of the hydrous sulphate of lime (calcium).When calcined, it forms plaster of Paris. Selenite is a transparent,crystalline variety; alabaster, a fine, white, massive variety.

[Sarah]

1.It's like cocaine (If cocaine was a completely harmless mineral, with no side effects whatsoever)

2.A town full rednecks, pseudo gangsters, and mexicans(the former could be considered the latter or vice-versa), and pot-heads.

[Dave Paprocki]

A soft white or grey mineral consisting of hydrated calcium sulphate. It occurs chiefly in sedimentary deposits and is used to make plaster of Paris and fertilizers, and in the building industry.

[Magaret]

Calcium sulfate dihydrate (CaSO4 2H2O) a sludge constituent from the conventional lime scrubber process, obtained as a byproduct of the dewatering operation and sold for commercial use.

[Renato]

a hard, white substance that is used in making plaster of Paris