Antique late 18th to early 19th century hand carved intaglio seal, signet wax marking stamp loose ring setting in golden banded natural Bowenite. A true gem of historical identity of European or Ottoman origin. Carved in reverse entwined monogram like Faberge and used in a scholar or Nobel seal rings.  This piece was used for wax sealing correspondence or important documents with an elegant golden hued Bowenite gemstone. This piece exhibits a high luster polished face with a back dome. Unset, loose antique ring setting with mirror like finish seal face. Structural banded stone typical of fine Bowenite. Intaglio hand carved in reverse in a stone that was prized by jewelers in its timeline. 16.1 CT in weight. Large size signet setting that deserves a fine setting with antique styling flare. 11/16-inch across the face x 38 inch thick at the rounded back side or 18 mm x 9mm. Images include microscopic images in detailing at two different magnifications and backlite for your viewing. Choice of first class or faster priority shipping. All items are guaranteed to be as shown in the listing images and as described.