Deco Style Three Stone Emerald Cut Diamond Ring in PlatinumDeco Style Three Stone Emerald Cut Diamond Ring in Platinum. This modern engagement ring features three emerald cut diamonds across the top. These stunning diamonds are accented by a halo of round brilliant cut diamonds, adding another layer of sparkle. The under side of the ring features beautiful filigree work that allows light to travel through the stones. This low to the finger ring has quite a visual impact!