If you have to know the resale value of diamond rings, it is necessary to be aware of the color, clarity, carat, and cut of the diamond ring you want to sell. You can look for a diamond having the same attributes as that of your stone and get an idea of what its retail price is. However, do not completely rely on retail prices to know how much your diamond is worth. This is because reselling it would not fetch your ring the same price as the retail price. Therefore, always expect a resale price lesser than the retail price.