74.6 MB (2.6 MB compressed)
6127 x 4255 pixels
51.8 x 36.1 cm ⏐ 20.4 x 14.2 in (300dpi)
DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Siderite. Siderite is an iron carbonate (FeCO3) mineral, and is an ore of iron. This sample is from the Eupel mine, Siegerland, Germany, and measures 14cm wide.
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