DAVID SCHARF / SCIENCE PHOTO LIBRARY DAVID SCHARF / SCIENCE PHOTO LIBRARY
Wollastonite, coloured scanning electron micrograph (SEM). Wollastonite is a white to greyish-white calcium-silicate mineral (CaSiO3). It is used commercially to enhance strength and increase durability in a range of construction materials including concrete, stucco, patching compounds and adhesives. It also provides added dimensional stability, sag resistance, and resistance to cracking from drying and freeze thaw effects. Magnification: x374, when printed 10 centimetres wide.
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