This Tiffany & Co. bi-color 18K gold diamond Sixteen Stone Ring was designed by Jean Schlumberger dates from the late 20th century. The ring is set with pairs of round brilliant-cut diamonds interspersed with yellow gold X motifs joining double white gold bands. A classic and beloved Schlumberger design, this bold, intricate ring has been a favorite choice for decades both for wedding band or for a stylish and substantial right hand ring.