Minerals Redcanyonite (IMAGE) Michigan Technological University Caption Manganese and ammonium give redcanyonite a darker color than the other minerals discovered by Olds. Credit With permission: Travis Olds Usage Restrictions ask persmission from Travis Olds for use 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.