A Ceylon sapphire of 4.77 carats, with a GIA report confirming Sri Lankan origin — a substantial weight in the material that has defined fine blue sapphire for centuries. The color is a bright, vivid cornflower blue, luminous and open, holding its intensity across the whole stone rather than darkening at the center. It is eye clean, and the modified triangular mixed cut is unusual and well executed, spreading the brilliance across a broad face. Heated, the standard and universally accepted treatment for blue sapphire.
