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.
Yet another important factor you should need if you want to resell your diamond ring is a grading certificate. A grading certificate is a proof of the quality of the stone you bought and determines how valuable it is. If you do not get a grading certificate for the stone you purchased, you can send your stone to a lab like GIA or AGA to get the certification that usually costs a fee.
The resale value of diamond rings may also change depending upon where and how you choose to sell the ring. If you exchange the ring for cash, you will probably get a low value when compared to exchanging it with another piece of jewelry.