subject: Sell Diamond Jewelry Profitably [print this page] You can go to a local jeweler and they will probably tell you that your diamond is not of the right cut or that the color is not presentable. They will give you anything to make you think less of what your diamond is worth. If you have the information about your diamond at hand, you will never go wrong with selling your diamonds. As the song goes, diamonds are forever and so is its value.