The thing that can significantly increase the price of diamond is its history. Diamonds with formidable history are most easiest to sell, mostly through famous auction houses, where there are of course extremely wealthy buyers. However very few diamonds have rich history so most diamond sellers have the "usual diamonds" to sell which are diamonds of average quality and without the history. Many people decide to sell diamonds on Ebay. Experiences of selling diamonds on Ebay are very different, from very satisfying to extremely negative. If you decide to go with Ebay make sure to have your payment placed in escrow. This way while your buyer examines the diamond you won't be exposed to risk of losing both your money and your diamond.
