Cut and Polished Diamond with Inclusions (image) Carnegie Institution for Science Share Print E-Mail Caption A cut and polished diamond of the kind studied in this paper with metallic inclusions. The most obvious group of inclusions looks like black spots on the left side, middle. Credit The photo is courtesy of Jae Liao. Usage Restrictions With credit Share Print E-Mail 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.