Three stone diamond engagement rings or trilogy rings can signify your relationship's past, present and future. There are many different variations of trilogy rings, all three diamonds can be the same size or the centre diamond can be larger with two smaller diamonds flanking it such as a graduated three stone ring. You can also choose a different shape stone for the centre such as an oval cut or an emerald cut diamond.  Browse our collection of three stone engagement rings and remember, we can always tailor make your own personal design to suit your style and budget.