The Lunnea ring is an authentic vintage engagement ring circa 1970's. This square emerald and diamond halo engagement ring features a .45 carat natural Columbian square cut emerald, surrounded by a delicate halo of 12 single cut diamond accents. The ring is crafted in platinum, with slightly tapered shoulders. A lovely ring, perfect to wear on either hand! In very good condition. Size 5 3/4 and easily sized.