Antique Engagement Ring Art Deco 1.88 Round Brilliant Cut Diamond in PlatinumBig, bold, sparkle is what this antique engagement rings is all about. Bead set diamonds line the sides of the setting, with more sprinkled under the crown all leading up to the star of the show, a 1. 88 carat round brilliant cut diamond with breath taking sparkle. Cast in platinum, this beauty has an unusual eight prong style crown gives the center diamond a slightly larger diameter, provider for a dramatically bold look. A wonderful engagement ring