Blue Diamond (image) Carnegie Institution for Science Share Print E-Mail 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. 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.