Can you recut a diamond into a different shape?

Yes. A diamond cutter can help you plan a new cut for an existing cut-diamond. Be aware that carat weight will be lost in this process and usually, depending on its clarity, could devalue or improve the value of the diamond.

For example, the diamond cutter may be able to plan a cut that renders an Internally Flawless diamond a Flawless diamond. This may increase its value. However, if a different cut is desired and the carat-weight loss is significant, the diamond may be devalued.