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Bauxite streak test

Bauxite streak test

C044/0258

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50.8 MB (4.9 MB compressed)

5168 x 3439 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

Bauxite 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. Bauxite has a white streak but it is sometimes contaminated with iron oxides that produce reddish streak. Bauxite is an aluminium ore.

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