Seraphina Trio Diamond Ring18kt gold and has sparkly diamonds which are all hand set. The elegant trio Seraphina trio ring has a slightly twisted shank which gives the ring the modern feeling that it needs and is a great addition to your jewellery collection. The three stone centre piece ring can also be viewed as an ideal engagement ring. Details: 0. 94ct white diamonds (G J, VS). The item is hallmarked by the London Assay Office.