The Pompadour collection by Maison Margiela plays with the concept of the family heirloom. Think a Ceylon sapphire, in an old-fashioned diamond setting that has been cloven in half for an edgy take on inheritance jewels. Similarly speaking, the witty Héritage collection is made up of ’non-engagement’ rings of disected white diamonds - fittingly sourced in Antwerp - set at each end of a gap in a white gold band.