The fabricator just installed the crema marfil countertop in our master bath. I purchased two slabs, one for counter and one for tub. Because the countertop is quite long, they have one seam. Here is the problem. The color at the seam one side of the marble is completely different than the other side --drastic difference. Even the edge which is a standard edge, has one color on the top and a different color seamed below. It looks like creamy beige next to gray. The fabricator insists that it is from the same slab. This is really hard to believe but, if it is, shouldn't they be using the part of the slab that blends to the next part? Any thoughts?