A rare raw 2 carat octahedron diamond in 18 carat gold organic gothic setting. Because of a diamonds highly symmetrical molecular arrangement, diamonds "grow" in what is known as "crystal habits." One of those is the octahedron, which is two, four-sided pyramids atop of each other. Most octahedrons are cut to make two faceted stones. In this stone, one retains the full power of its original shape. The shank is oxidized silver and 18 rose gold in organic forms. The ring is available now in size 5 but can be resized to fit.