Emeritus professor of mineralogy George R. Rossman passed away on February 6, 2026, at the age of 81.
In 1971, Rossman obtained his PhD in chemistry from the California Institute of Technology (Caltech). In that same year, Caltech’s Division of Geological and Planetary Sciences hired him as an assistant professor of mineralogy after initially recruiting him as a mineralogy instructor. Over the next 55 years, he made significant contributions to the field and instructed thousands of students in mineralogy and mineral spectroscopy. He is remembered as an engaging and dedicated instructor, and in 2004 was awarded Caltech’s most prestigious teaching honor, the Richard P. Feynman Prize for Excellence in Teaching.
An active researcher, Rossman published more than 400 papers with several still in progress when he passed away. His work was largely driven by a straightforward question: “Why do gems and other minerals possess their distinctive colors?” This led him to become an invaluable contributor to GIA, serving on the board of governors from 1995 to 2007, mentoring GIA researchers, and coauthoring numerous papers with them. He was also a respected member of Gems & Gemology’s editorial review board and authored and coauthored many significant articles featured in the journal, including a set of four seminal papers in the 1980s that spoke to his fundamental question regarding color.
Rossman had an infectious curiosity, and his special passion for minerals led to many awards throughout his storied career. Notably among them, he received the inaugural Dana Medal from the Mineralogical Society of America (MSA) in 2001 and the Roebling Medal (MSA’s top honor) in 2021. He also had three tourmaline mineral species named in his honor: rossmanite (see above), alumino-oxy-rossmanite, and fluor-rossmanite.
We extend our sincere condolences to Rossman’s family, friends, and colleagues. A more detailed tribute recognizing his contributions to gemology and mineralogy will be published in an upcoming issue of Gems & Gemology.
Emeritus professor of mineralogy George R. Rossman passed away on February 6, 2026, at the age of 81.
In 1971, Rossman obtained his PhD in chemistry from the California Institute of Technology (Caltech). In that same year, Caltech’s Division of Geological and Planetary Sciences hired him as an assistant professor of mineralogy after initially recruiting him as a mineralogy instructor. Over the next 55 years, he made significant contributions to the field and instructed thousands of students in mineralogy and mineral spectroscopy. He is remembered as an engaging and dedicated instructor, and in 2004 was awarded Caltech’s most prestigious teaching honor, the Richard P. Feynman Prize for Excellence in Teaching.
An active researcher, Rossman published more than 400 papers with several still in progress when he passed away. His work was largely driven by a straightforward question: “Why do gems and other minerals possess their distinctive colors?” This led him to become an invaluable contributor to GIA, serving on the board of governors from 1995 to 2007, mentoring GIA researchers, and coauthoring numerous papers with them. He was also a respected member of Gems & Gemology’s editorial review board and authored and coauthored many significant articles featured in the journal, including a set of four seminal papers in the 1980s that spoke to his fundamental question regarding color.
Rossman had an infectious curiosity, and his special passion for minerals led to many awards throughout his storied career. Notably among them, he received the inaugural Dana Medal from the Mineralogical Society of America (MSA) in 2001 and the Roebling Medal (MSA’s top honor) in 2021. He also had three tourmaline mineral species named in his honor: rossmanite (see above), alumino-oxy-rossmanite, and fluor-rossmanite.
We extend our sincere condolences to Rossman’s family, friends, and colleagues. A more detailed tribute recognizing his contributions to gemology and mineralogy will be published in an upcoming issue of Gems & Gemology.
