An 18k white gold half diamond eternity ring by Mappin  & Webb. The ring is set through the centre with 13 princess cut diamonds totalling approximately 0.33ct. The ring measures 2.5mm in width and is a size M but can be adjusted for a perfect fit with a gross weight of 2.90 grams. The ring comes complete with a RichDiamonds presentation box and our own certificate of authenticity.