Gypsum Crystals

Gypsum. Polarized light micrograph of a thin section of gypsum. Gypsum is a chemical sedimentary rock, composed mainly of hydrated calcium sulphate. It may grow as a crystal aggregate (as here) or in giant tabular crystals up to 1 meter in length. Gypsum is used in plaster of Paris, in Portland cement and as a flux in pottery. The most compact form of gypsum is known as alabaster. Sample collected in Penfield, New York. Object size: 40 mm.

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Filename: K17pol-gypsum_4704.jpg
Copyright: Ted Kinsman / Science Source Inc.
Image Size: 4434x3476 / 4.2MB; earth science geology geomorphology gypsum light micrograph plm rocks sedimentary rock type polarized alabaster calcium sulphate building material calcium sulphate dihydrate crystal crystalline crystals mineral multiple plaster
Contained in galleries: science

Gypsum. Polarized light micrograph of a thin section of gypsum. Gypsum is a chemical sedimentary rock, composed mainly of hydrated calcium sulphate. It may grow as a crystal aggregate (as here) or in giant tabular crystals up to 1 meter in length. Gypsum is used in plaster of Paris, in Portland cement and as a flux in pottery. The most compact form of gypsum is known as alabaster. Sample collected in Penfield, New York. Object size: 40 mm.