1.76 ct Violetish Blue Oval Sapphire
Lovely oval shaped sapphire in violetish blue colour. This gemstone would make a timeless engagement ring especially if surrounded by sparkly diamonds.
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.