My Story 14-k rose-gold locket necklace with opal, $2,440. Links: Vhernier’s uncommonly elegant necklace is off the chain. Vhernier 18-k white-gold necklace with diamonds, $50,300.

The rose gold heart-shaped locket that is available in Argos for £99.99 Credit: Argos Both necklaces feature an eye-catching gold chain complete with a locket in the shape of a heart, that opens up.