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
Yellow gold 18k 750/1000 shield man ring with sided decorations
18k (750) Yellow Gold and Diamond Ring for Women
Yellow solid gold 18k 750/1000 shiny and satin man ring
18k 750 Yellow Gold Puzzle Ring Size 9 1/2
Ladies Genuine Tiffany & Co. 18K 750 Yellow Gold 5mm Wedding Band Ring
0.25 Cts Round Brilliant Cut Diamond Men's Solitaire Band Ring In 750 18K Gold — Jisha Jewels
Is this gold ring real? Got it at a flea market. The stamps say ”18k” and ” 750”. : r/Gold
18k 750 Yellow Gold RT Robert Tateossian 2.03ct Ruby 1.04tw Diamond Cluster Ring | Barry's Pawn and Jewelry