Why does black granite especially countertops fade?
Black Granite is sometimes doctored with dyes and oils to darken the surface. The fading is nothing but the wearing away of these dyes and oils. The remedy unfortunately is to re-polish the top, which incidentally is expensive. To check if granite top has been doctored, before you purchase it, take a clean white rag and apply some acetone to the surface of the granite. If any residue or black color is observed on the top, it means it has been doctored.
