Two-Tone Mid-Century Solitaire Diamond Engagement RingTwo Tone Mid Century Solitaire Diamond Engagement Ring. This vintage engagement ring holds a . 42 carat Round Brilliant cut diamond. This Mid Century ring offers exceptional light reflection and a stylish two toned band of warm cool, yellow and white gold. Created between 1940s 1960s, the details of Mid Century sensibility are shown in the sculpted prongs holding the primary stone. Contact one of our jewelry experts if you have any questions on