I think he is the director of the Smithsonian Institute..........which is why we visited so many times when i was a kid... a Chamberlain...........was one of the big 3 donors of gems to the SI............he is one of the characters in the book........Lost Symbol about DC............a 33rd degree mason and director of the SI.;.

Geology, Gems and Minerals - Smithsonian National Museum of ...

https://naturalhistory.si.edu/education/exhibitions/geology.html

The Hall of Geology, Gems, & Minerals presents specimens from the Museum's collection of gems, minerals, rocks and meteorites. Students can also explore ...