A colour change sapphire and diamond ring

A colour change sapphire and diamond ring, the octagonal sapphire weighs 6.48cts and is flanked with triangular shaped diamonds in wide yellow gold mount with pellet borders, size P

Accompanied by report number 984222 dated 5 October 2007 from The Precious Stone Laboratory stating that the square-shaped sapphire weighs 6.48cts and is a natural colour-change sapphire exhibiting purplish blue in daylight and purple under incandescent light, with no indications of heat treatment.