Duncan Keller is a mineralogist and petrologist working to improve use of mineral textures and chemistry for interpreting rocks and the evolution of Earth through deep time. One of his longstanding interests is the information preserved in exsolution textures, especially in garnet. These are some of the most beautiful mineral structures on Earth (and in space!) and they hold a wealth of data. He has experience cataloging/curating/teaching from mineral collections at Yale University and Colgate University and has helped develop museum displays for public outreach and education. His current project focuses on Anorthosite formation processes during Earth’s Proterozoic eon.