1. Department of Earth and Atmospheric SciencesCornell University Ithaca New York USA
2. Lamont‐Doherty Earth Observatory of Columbia University Palisades New York USA
3. Department of Earth and Environmental SciencesColumbia University New York New York USA
4. Now at ConocoPhillips Houston Texas USA
5. School of Earth and Environmental SciencesSeoul National University Seoul South Korea
6. Now at ESIGELEC Graduate School of Engineering Saint‐Etienne du Rouvray France
7. Now at Gemological Institute of America New York New York USA