I'm a nuclear engineering student and part time gem collector and I have a friend who ran a gem shop from the 60's to the early 2000's on the East coast of the United States where there was a vary large and present Russian community. His father amassed quite a collection of stones. I'm curious if some of them have Romanov links.
I hope that you will enjoy your experience on TRF. We have several members who enjoy discussing the Russian Imperial and Nobel jewel. Though I think that it will be difficult to track individual stones.