DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Decrotive Paesina stone. Macrophotograph of the cut and polished surface of a piece of Paesina stone, from Italy. This is a form of calcium carbonate that is coloured due to impurities it contains. Magnification: x8 at 4x5 inch size.
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