Stem cells turning into bone cells (IMAGE) RMIT University Caption Magnified image showing adult stem cells in the process of turning into bone cells after treatment with high-frequency sound waves. Green colouring shows the presence of collagen, which the cells produce as they become bone cells. Magnification: 60X Credit RMIT University Usage Restrictions Credit RMIT University License Original 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.