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Botryoidal hematite

Botryoidal hematite

C039/4768

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58.2 MB (4.1 MB compressed)

5435 x 3744 pixels

46.0 x 31.8 cm ⏐ 18.1 x 12.5 in (300dpi)

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Credit

DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY

Caption

Hematite is a variety of iron oxide (Fe2O3), a mineral mined as one of the main ores of iron. It is also used industrially as a red pigment in paint, and in polishing compounds. The specimen shown here has a bulbous appearance, also referred to as botryoidal (grapelike), which in mining practice is referred to as kidney ore. In nature its surface is always coloured a dull yellowish to red-brown; the glossy black surface here seen is thanks to polishing. Specimen is from Taouz in Morocco, actual width 18 cm.

Release details

Model release not required. Property release not required.

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