Scallop Shell and Pigments (IMAGE) University of Bristol Caption A perforated upper half-valve of Pecten maximus from level Ik at Cueva Antón (Upper). The internal, naturally red side (Left) and the external, whitish side that was painted with an orange colorant made of goethite and hematite (Right). (Lower) binocular microscope close-ups on pigment masses and pigment stains around the perforation. Credit PNAS Usage Restrictions For single use only to illustrate this story. Not to be archived. 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.