Mid-Century Emerald & Diamond Ring in 18k Yellow Gold and PlatinumMid Century Emerald Diamond Ring in 18k Yellow Gold and Platinum. This lovely Mid Century ring is a perfect item for the season. The primary stone is a . 79ct genuine natural diamond, surrounded by layers of natural emerald and additional diamonds that drip halfway around the shimmering platinum band. Total diamond weight = 1. 34ct. From the profile, the Mid Century design incorporates a mesmerizing decorative pattern in platinum, underneath a yellow