STEFAN DILLER / SCIENCE PHOTO LIBRARY STEFAN DILLER / SCIENCE PHOTO LIBRARY
Limescale. Coloured scanning electron micrograph (SEM) of limescale from a domestic kettle. Limescale, which occurs when hard water is boiled, consists mainly of calcium carbonate crystals that have precipitated out of the water. Magnification: x1109 when printed 10 centimetres high.
Model release not required. Property release not required.