My grandmother was an antique collector and I randomly found a ring while sorting through her estate after her funernal.
After research I have found the ring is a gypsy with one large bezel set and it looks almost identical to this ring in porportions and the way it looks:
http://pages.hpsjewelers.com/3955/PictPage/1922868588.html#images
However, I haven't been able to see anything similar for the maker's mark. I believe the maker's mark might be a rose with two arrows on each side pointing to the rose.
I'd appreciate it if anyone knows anything about this type of ring, thanks!