If you are planning to buy an emerald diamond ring, try the following design trends to make the engagement ring unique.         Twisted Rope Solitaire Diamond Engagement Ring This is a beautiful and modern design that features a twisted rope design style in a band made of platinum or yellow gold. The ring has a solitaire emerald-cut diamond that stands alone to provide the elegance and beauty to the overall ring.   Cinderella Ribbon Diamond Engagement Ring This style of emerald diamond engagement ring features a double ribbon inspired by Cinderella. In addition, the ring features an emerald cut centerpiece, pave set round brilliant diamonds along with two bezels set surprise diamonds. Halo Split Shank Diamond Engagement Ring Halo split styles are a timeless design choice. This design style features an emerald cut diamond as the centerpiece with a halo of round brilliants surrounding it, and round diamond accents running along the entire length of the band.