A sapphire and diamond trilogy ring in 18ct bi-coloured gold, centred with an oval-cut sapphire of dark blue colour, approximately measures 5.9 x 4.0 x 2.4 mm, flanked by two brilliant-cut diamonds with an estimated total weight of 0.31ct, tapered shoulders leading to D-section shank, London hallmarked with maker's mark 'ATLd', size P, total weight of item 3.9 grams.