Allyra T Sapphire and Diamond Engagement RingInformation: Available in 18K white gold, rose gold and yellow gold. Pictured with a 1. 0ct oval blue green sapphire. Pictured with 2x 0. 20ct round brilliant diamonds. Band is 2mm wide at widest point and tapers in to meet basket. Style code: AllyraT Design starts from a 0. 40ct centre gemstone As a bespoke jeweller, we are able to customise all of our fine jewellery to your requirements including different shapes and sizes of diamonds or gemstones.