De Beers London Talisman Medal 18-karat Gold Diamond Necklace

De Beers' necklace is part of the 'Talisman' collection, which pays homage to the "ancient appreciation" of rough diamonds that were once considered lucky charms. Cast from 18-karat gold (750), it's strung with a 'Medal' pendant that's hand-hammered using the label's 'serti poinon' technique and set with diamonds, including both polished and raw ones.