Probably the most important piece of jewellery you will ever buy, an engagement ring is a very special purchase. Choose from a range of authentic, proposal-ready, pre-owned Tiffany & Cartier engagement rings. Our rings offer a significant discount on new RRP, whilst retaining all the reassuring quality and longevity of these luxury brands. Unless stated, all our carefully chosen engagement rings can be re-sized. Read more abut how laser inscription and serial numbers help guarantee your Tiffany & Co. engagement ring's authenticity.