18K Yellow Gold Octagonal Diamond Halo Men’s RingBold, stylish, and full of character, this 18K yellow gold mens ring showcases a striking geometric design accented with rich black enamel. At the center sits a brilliant round diamond framed by a radiant sunburst motif, surrounded by an octagonal halo of sparkling accent diamonds for a total of approximately 0. 51 carats. The contrast between the high polish gold, the bright diamonds, and the enamel detailing creates a distinctly sophisticated look.