Crystal Formation (IMAGE) Eindhoven University of Technology Caption This is a 3D electron microscopy image of the calcium carbonate crystals that grow to the organic surface. The flat part of the crystals is in contact with the organic layer. (the width of the crystals is approx. 400 nanometers) Credit Nico Sommerdijk Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.