Olivine (IMAGE) University of Münster Caption The mineral olivine contains melt inclusions (black dots), just a few micrometers in size. The geochemists isolated these inclusions and investigated the isotopic composition with mass spectrometers. Credit Münster University - Felix Genske Usage Restrictions Please use this picture only in connection with the press release. 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.