This is a lovely Princess Diana sapphire diamond 18k white gold engagement ring. The ring is centered by a fabulous Ceylon sapphire that weighs approximately 4.56ct. And the characteristics of this vivid blue center stone reveals to be the same as those of the natural sapphires from Ceylon or Sri Lanka. The sapphire is accentuated by approximately 0.85ct of sparkling round cut diamonds. The color of the diamonds is from F with VS1 clarity. The top of this ring measures 19mm by 12.5mm and the size of the ring is 6 but it can be resized. The ring is stamped 18k.