I have actually looked into getting certified diamonds to make my own and design my own jewelry. Not for resale but just for myself. The thing is that you have to make sure that you get them from a reputable sourse and site because there are a lot of sites out there that are selling bad gems and precious stones. You have to make sure that you look at the cut, color, style, quality…it is all so important. And make sure that there is a guarantee on your purchase before you spend all that money for your diamonds!