Antique Engagement Ring Art Deco 1.50 GIA Certified Round Brilliant Cut Diamond in PlatinumUnique in its design this Art Deco ring features a lovely 1. 50 carat GIA certified round brilliant cut diamond, with accent diamonds laid out in a triangular pattern. The accent stones on the shoulder of the ring are single cut diamonds with a total weight . 24 carats. The side diamonds are bead set with a bright finish. This Art deco ring is classic in its structure yet individual in its design.