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
Bague Or 750 18k Rubis & Diamant- 11.6grs -74 - L'Atelier des Bijoux d'Occasion
Rare David Yurman mens 925 Silver & 750 18k Gold cable signet ring size 10.5 | eBay
Bague Vintage Or 750 18k 18 Diamants - 6.45grs -62 - L'Atelier des Bijoux d'Occasion
Auth Cartier Wedding Love 1 Point Diamond Ring 750(18K) Yellow Gold #53 US6.5 | eBay
Bague Vintage Or 18K 750 Diamants - 4.8grs- 53 - L'Atelier des Bijoux d'Occasion