7.70 ct Royal Blue Oval Sapphire
Intense vivid blue colour with excellent overall makeup. This gemstone will give any piece of jewellery a lot of attention.
More care is needed with treated stones.
Sapphires can be treated to improve colour by a process called diffusion. Older stones treated in this way may only have treatment near the surface, so if you become aware that you or a customer has a stone treated in this way avoid repolishing.