“What stands out immediately is that Gigi didn’t choose a traditional plain diamond eternity band or classic gold wedding ring [for her new ring],” Ali Galgano, founder of , tells ELLE. Per Boucheron’s website, the Quatre Radiant Edition wedding band features yellow gold grosgrain, which is “a nod to the Boucheron family’s draping tradition.” “Traditionally, these requests have been for an engagement ring with a white gold basket [for the diamond] and a yellow gold band,” she says. “Yellow gold carries warmth, vitality, and the energy of the sun, while white gold feels cooler, luminous, and refined. Maintaining perfectly crisp transitions between yellow gold, white gold, diamonds, and the signature textured motifs requires extremely tight tolerances.