Tiffany & Co. 18k and platinum diamond earrings, $11,000 from Botier on 1stdibs 1940s platinum and diamond wing earrings, $19,450 from Pampillonia on 1stdibs French from the 1950s in platinum and 18k gold with rubies and diamonds, $4,600 from Lawrence Jeffrey Try an Estate Sale If you’re worried about buying antique jewelry from a dealer or…