Found this ring today by a river. Hallmarked 18K 750 but was tarnished like brass til I polished it up a tad. An old fake perhaps, or can 18K come out of
18k 750 Yellow Gold RT Robert Tateossian 2.03ct Ruby 1.04tw Diamond Cluster Ring | Barry's Pawn and Jewelry
How much is 750 gold worth?
Cartier Tank Normale Large Model 1973 GM LM 18k 750 Gold Ref 78092 Folding Clasp For Sale at 1stDibs