The Christopher RingAntique Cushion Cut Engagement Ring A showstopping, antique engagement ring featuring a 3. 49ct natural blue green sapphire surrounded by a halo of old single cut diamonds. The antique ring is fashioned in 18k yellow gold, and topped with silver for enhanced brightness to the stones. The appraisal of the vintage ring is attached as one of the images; there you will find detailed information about the ring, as well as the appraised value of the ring at