Tiffany & Co 1979 18k Yellow Gold Carved Green Jade Set Of Cufflinks & Shirt Studs:Designer: Tiffany & Co:Stones & Gems: Green Jade:Total Item Weight: 13.8g:Measurements: cufflinks 12.95mm circumference; studs 9mm circumference:Hallmarks, Stamps or Metal Test: T & Co 1979 18k