seal ring

from The Century Dictionary.

• noun A finger-ring in which a seal is inserted as the chaton or bezel; hence, by extension, a ring in which is set a piece of hard stone upon which a seal may be engraved.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A finger ring with an engraved (often heraldic) seal, fit for sealing documents by pressing it in sealing wax or a similar substance

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a ring bearing a signet