Grey onyx is a gorgeous natural stone that looks amazing wherever it is installed. While grey allows the surface to serve as a neutral color, a grey onyx countertop, backsplash or vanity top will have unique character to it. In addition, because onyx is translucent, it can be backlit. Doing so helps highlight the colors and patterns present in the stone. Grey onyx is a fantastic choice for any homeowner that is looking for a one-of-a-kind natural stone surface.