I know you want to keep it white, but consider Butcher block. It makes the third surface/mixed materials actually make sense.

Thanks, eam44, for the response. But what do you mean by the third surface?

Perhaps I misunderstood. I thought you were just replacing the color mismatched piece, so #1.) Granite, #2.) solid surface, and #3.) something else in your problem area. Now it sounds as though all of the solid surface will disappear, is that correct?

Yes, the entire white part of the island would be replaced. Sorry if I wasn't clear. Again, brain is very tired.

Neolith. Practically indestructible. Here's their white: Neolith Arctic White

And here is their website to check through their other choices. Personally I think their onyx would work spectacularly.

twobells:

Is your top larger than 65" x 130"? Blizzard is available in jumbos. If it is, cut the jumbo and seam it. I know that'll match.

I agree that it's a rookie mistake. My fabricator made sure my slabs came from the same lot.

You've made some excellent choices, including your choice of fabricator, who despite the mistakes that are driving you to distraction, is ready to correct them. The space looks beautiful.

He is willing to replace everything, but maybe the best option for you is to deal with that one small mismatched spot. You could bring the black galaxy granite up to meet the solid surface there, or depending on the location (hard to tell) you could consider just replacing it with butcher block. It will add visual complexity to the space, but if the location makes sense, it could be useful prep space.

thanks, everyone, for the helpful comments!

cpartist....unfortunately, this stone yard does not carry Neolith or Dekton although they both carry some beautiful options. I will need to choose something that they have available in their warehouse.

Joseph....According to the stickers when they arrived at my house, the slabs were from the same "lot." It's a very odd situation in that when you are close up to the slabs, they appear to be almost a dead on match, but the further you step away, the worse they look. And unfortunately, you can see the mismatch from my front entry. I actually think Caesarstone is covering these slabs, bc there was a rep at my house. As far as size, the island is 64" x 154." I think we could seam by the sink (which is currently a seam) and the length would be ok, but isn't the width still too close to cut? They seemed concerned about this originally because of the mitering. I'm not sure how that translates during fabrication.

eam....you are right in that my choice in stone supplier/fabricator. I feel very lucky that they are honoring their work. Thankfully, they have a good relationship with my builder, who is also wonderful. I believe that has made a tremendous difference. As far as the butcher block, that is an interesting suggestion. I think I need some time to consider that; it might be a good option for me.

Have you considered white Corian? Any seams will be near invisible and it's a joy to work on.

And you can see the numerical run numbers printed on the back of the Corian. When they are sequential, the color match is flawless.

"...but isn't the width still too close to cut?"

No. When the manufacturer says 65", they're guaranteeing you're getting 65". I've had 120" quartz slabs with 122" of useable material.