Sapphire trilogy ring

A sapphire and diamond three-stone ring in 18ct white gold, centred with a rectangular step-cut sapphire with canted corners, measuring 6.8 x 4.4 x 3.9 mm, set between round brilliant-cut diamonds with an estimated total weight of 0.40ct, between tapered shoulders, British assay marks, size J, 2.7 grams.