Artcarved 14k Gold Vintage UT School Signet Ring with Black OnyxMynt Auctions4.4(887)US$1006 days Left
14K Yellow Gold Rectangular Signet Ring Size 7 Engravable Matte FinishMynt Auctions4.4(887)US$100Jun 19, 2026
ANTIQUE 10K YELLOW CABOCHON BLACK ONYX OVAL GYPSY SIGNET MEN'S RING -9.5GModern Jewelry4.5(207)US$1,325Jun 28, 2026
Vintage 1930's Letter MP Initial Black Onyx Diamond Signet Ring 14K Gold 3.24 GrJasper524.5(10.5k)US$340
Vintage 1970's Men's Black Onyx Signet Ring 14K White Gold, Size 10.75, 12.78 GrJasper524.5(10.5k)US$1,300
Vintage 1950's Men's SD Letter Black Onyx Signet Ring 10K Yellow Gold, 10.16 GrJasper524.5(10.5k)US$800
Unisex Sterling Silver Rectangular Signet Ring M. Cohen Lira CollectionBidhaus4.3(867)US$2206 days Left
Sterling Silver Midnight Square Black Onyx Signet RingWeatherham Estate Treasures3.8(241)US$185Jul 07, 2026
