DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Hematite crystal. Hexagonal crystal of hematite. Hematite is an iron oxide and varies in colour from metallic black to dull red. Hematite is a common and widely-distributed mineral occurring in igneous, sedimentary and metamorphic rocks. It is the most important ore of iron and has other industrial uses in paint manufacture and polishing compounds. The actual size of this specimen is 65 x 80mm.
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