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Gypsum streak test

Gypsum streak test

C044/0268

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50.8 MB (5.5 MB compressed)

5167 x 3438 pixels

43.7 x 29.2 cm ⏐ 17.2 x 11.5 in (300dpi)

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Credit

TURTLE ROCK SCIENTIFIC / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY TURTLE ROCK SCIENTIFIC / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY

Caption

Gypsum streak test. The streak test is used to determine the colour of a mineral in powdered form. It is done by scraping a specimen across a piece of unglazed porcelain known as a streak plate. Gypsum has a white streak. It is a soft mineral composed of calcium sulphate dehydrate (CaSO4 2H2O). Gypsum is defined to have hardness of 2 in the Mohs scale.

Release details

Model release not required. Property release not required.

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