How much will it cost to get the scratches out of a diamond?

Take your diamond to a gemologist who can help you determine the depth of the scratches and advise you of the current value of the diamond without the scratches.

This valuation includes its carat weight, its colour, its clarity and its cut.

Then, the gemologist can advise you as to the best course of repair, given the attributes of the diamond that you want to preserve, and the estimated value once these repairs are made.

Finally, you can decide whether or not to pursue the repairs, given the altered -- even enhanced -- value of the diamond after repairs have been made.