Kate Middleton, the Princess of Wales, showcased a new ring stack as she attended the Duchess of Kent’s funeral on Tuesday, September 16. Kate paired her famous, sapphire-and-diamond engagement ring with four other thin bands, wearing all five on one finger for the first time to create an on-trend stack. One eternity ring, a newer addition to the Princess’s jewelry box since last year, is adorned with diamonds and sapphires, and is thought to be the Étincelle de Cartier wedding band. Many have speculated that the ring may have been a present from Prince William to mark the end of Kate’s course of preventative chemotherapy—and of course, it coordinates perfectly with her engagement ring. The fourth and final band adorning the Princess’ finger was, of course, her wedding ring, crafted from the same nugget of Welsh gold used for Queen Elizabeth's own wedding band.