Your layout doesn’t really work. You need to subtract a couple of inches at all the edges of the stones,and for every cut. You need 4 slabs. And that is if it is very pattern consistent.

You may need 5 slabs to get a good match at that peninsula seam. That would be a priority, and I wouldn’t care if it cost an extra slab to do it . That will be the most prominent seam in the job, and in the most used spot. It needs to be good. And if it takes that 5th slab to make that happen, you need to buy that 5th slab. The time to economize was when the size of the kitchen was being determined in the design phase. Not now.

You may need 5 slabs to get a good match at that peninsula seam. That would be a priority,

Those pieces aren't as close to the edge as they look. They are all between 58 and 68 inches and the slab is 72". I agree that the seam in the peninsula is super important, but we don't need an extra slab to make a good match. In fact, the way it's laid out, no care has be taken to book match any of the seams. That's why I don't understand why the 4th slab. Looking at my pictures, it won't be difficult to make that seam disappear. . Also, there is no 5th slab at this point.

Nicely done seams in stone with little or no movement are inconspicuous. Run your layout past your fabricator and see what he says.

I sent it over today. I'll hear from them tomorrow. I saw these slabs but the fabricator hasn't. I went to look at them at his supplier. They are very clean at the edges, no chunks missing, so I think 3 can work. We'll see what they say.

I actually never saw the 4th slab so I'm not even sure if I would like it. If three isn't enough, I'll do the island in butcher block.

I would definitely avoid a seam on the island if possible. Seams don't disappear.

I would definitely avoid a seam on the island if possible. Seams don't disappear.

There's no seam on the island; it's too levels. Unfortunately the peninsula is too long to avoid a seam, though.

I realized that all my favorite natural stones had too much movement to look good installed on an 18' straight run. Quartz it is.