It probably most likely stands for Trigem Designs located in Washington State. In business since 1977 and made or now makes jewelry from "mined natural stones".
Rating
TG Maker's Mark by: Anonymous
Good Morning!
Toni, do you any idea of the age of the ring? Any background Information that might help? Are the letters, TG overlapping, if so, it could be Italian made by unknown designer - 1970s - to the Present. Is the ring Silver?