Boucheron - Serpent Bohème 18-Karat White Gold Diamond Ring - 51

The 'Serpent Bohème' collection may have debuted in 1968, but it's inspired by a necklace founder Frédéric Boucheron made for his wife in 1888 - it's remained a symbol of love, protection and happiness ever since. Cast in Italy from 18-karat white gold, this ring has an open silhouette tipped by diamond-encrusted versions of the instantly recognizable teardrop pendants.