Aragonite (image) DOE/Pacific Northwest National Laboratory Caption An aragonite crystal -- with its characteristic "sheaf of wheat" look -- consumed a particle of amorphous calcium carbonate as it formed. Credit Nielsen et al. 2014/Science Usage Restrictions Credit appropriately 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.