SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Broken glass. Coloured scanning electron micrograph (SEM) of the edge of a piece of broken glass. The smooth, unbroken surface is seen across top. Glass is a transparent brittle material, made of a mixture of silica and other minerals. It is hard, and its sharp edges can easily cut human skin. Magnification unknown.
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