Three Stone Halo Diamond Engagement Ring MR2920Simon G. built the MR2920 around a triple halo silhouette. A round center stone flanked by two side stones, each framed independently in hand set pav diamonds with Art Nouveau inspired scroll engravings and filigree running beneath the crown. The peek a boo diamonds set into the gallery side and the milgrain edged metalwork are the kind of details that make this ring feel like a genuine heirloom.