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Gypsum Crystals, SEM
24" x 18"
Photographic Print

Gypsum crystals Coloured scanning electron micrograph SEM of crystals of calcium sulphate dihydrate or gypsum Gypsum is used as plaster of Paris It is a white rock that is ground to a fine powder and then heated until it has lost about three quarters of its water content When this powder is mixed with water the paste dries to a rockhard finish