Diamond inclusions (image) Carnegie Institution for Science Share Print E-Mail Caption This close-up view of a super-deep diamond highlights its inclusions, seen here as black spots. Inclusions like these provide geochemical evidence that a sinking oceanic plate can carry water and other fluids deep into the mantle. Credit Photo by Evan Smith/© 2021 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.