For Sale on 1stdibs - Tiffany & Co. Jean Schlumberger’s rendition of an “X,” the popular symbol of love. In 18 karat gold with round brilliant diamonds in platinum. 16 diamonds Tiffany Diamond Ring, Jean Schlumberger, Brilliant Cut Diamond Ring, X Ring, 18k Gold Ring, Tiffany And Co, Symbol Of Love, Brilliant Diamond, Hermes Bag Birkin