Blue Diamond (IMAGE) Carnegie Institution for Science Caption A blue, boron-bearing diamond containing mineral inclusions that were examined as part of this study. This gem is 3.81 carats and 1.26 centimeters long. Credit Photo by Robison McMurtry/GIA. Usage Restrictions With credit. 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.