Tiffany & Co signature X 18k white gold ringBrand: Tiffany & Co Style: Signature X Ring Color: Silver Materials: 18k white gold Hardware Color: Silver Size: 7. 5 Condition: 8 10. This great classic piece is a wardrobe staple that will never go out of style. It is white gold, but will need re dipped which happens with white gold pieces that are well loved. You can see the yellow gold peaking thru mostly at the bottom of the band, but also at high contact points on the front X design. Free US