Easiest transition is for them to be a different thickness. 1 1/2" granite w/ 2" butcher block.

Other than that you can use an acrylic seam, metal seam or have the butcher block custom formed to fit perfectly with the stone.

My husband is worried that with the different levels its a accident waiting to happen for things spilling etc. I do like the different levels though

I agree and not sure why you want both IMO the island in a different counter than the perimeter is nice but not mixing both on one island unless they are really different heights

Thanks, my only concern is the island is quite large. We are renovating from a 2 tier island - bar height and counter height. That island was approx 11' x 6' with a prep sink. we have decided to go the one level. This island is 10 x 5 still with the prep sink. We have designed the one end of the island with table type seating. This was the area that I was going to put the wood top. Have found some pix but all have about 1/2" - 1" in between. Still doing some drawings with my designer.

If you want ‘table type seating’ drop this section down to table height- 30”