Tami, Bob; the white lettering above about matches the "clean stone" at the top of the rock. Howsomever, once we clean the main portion of the rock, that more natural look may not be as evident as it "whitens" also.

On the other hand, in the photo below, the black stands out better than I thought it might.... and will even more when the rock is cleaned. Do you like the lettering font, or would you prefer something different?