“Where can I sell my diamond ring in Oklahoma City, OK?” Oklahoma City residents sell diamond rings and fine diamond jewelry to Oklahoma City Diamond Buyer for two important reasons. 1) Our Oklahoma City diamond appraisal and sales process is safe, quick, and risk free. 2) Every Oklahoma client is guaranteed a fair and immediate cash offer based on the worldwide market value of their diamond jewelry. While Oklahoma City Diamond Buyer does purchase mass market diamond jewelry, we specialize in high-brand diamond jewelry, antique diamond jewelry, limited-edition diamond watches, and large carat diamonds valued up to $250,000. Call 405-896-9290