4.39 ct Oval Blue Sapphire
Excellent oval shape gemstone in lively and bright blue colour. This beautiful sapphire would be an excellent fit for an elegant engagement ring.
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.