Thalia is a ring with tanzanite as the center stone. She is composed of sterling and fine silver and is a size 7. This and all my rings have a comfort fit so that the rings are comfortable to wear, to put on and to take off. Thalia is stamped Sterling and with my logo (see the blackened image). My logo is trademarked with the US Patent and Trademark Office, Reg. No. 5,878,040.