ADRIAN BICKER / SCIENCE PHOTO LIBRARY ADRIAN BICKER / SCIENCE PHOTO LIBRARY
Mica inclusion (black) in igneous rock. A pound coin has been placed below the deposit (bottom) to provide an idea of scale. Mica is a silicate mineral with a lamellar (gill-shaped) form. It has a variety of industrial uses. Photographed on North Uist, in the Outer Hebrides, Scotland, UK.
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