1. Gemological Institute of America (GIA), 50 W. 47th Street, New York, New York 10036, U.S.A.
2. † Special collection papers can be found online at http://www.minsocam.org/MSA/AmMin/special-collections.html.
3. Geodynamics Research Center (GRC), Ehime University, Matsuyama, 790-8577, Japan