Sorry I have no ide what you are showing or what you want from us .Voting is not how you get help 2 very differnt kitchens with very differnt counters are not going to help you. We need to see your kitchen and get a feel for your style so post pics here in a comment of your kitchen style , cabinets , layout all things about your space .

It's okay, Patricia. There is no kitchen, yet. Only asking if 2cm perimeters countertops with a 3cm island is even a thing? The photos were for attention only. Have a joyful morning!

What look are you trying to achieve with different counter thicknesses? I think if I saw the same stone in two thicknesses in the same kitchen, I would think it was a mistake.

I feel like the only time different thicknesses would look okay is if one of them was a thick butcher block.

If you can get 3 cm slabs in your area, then just go with that. Just do a simple eased/pencil edge for perimeter and island. No need for miters or built-up edges.

Thanks, yes. Eased edges planned.

@chispa Our builder is able to source the stone by the linear ft. so was just curious if it would be worth the cost savings of doing the perimeter in the 2cm instead of 3cm. It wasn't suggested, just being curious. Didn't know if that was even a thing.

You do 3 cm on both. Any savings would be negligible......and it looks like a cheat for no purpose.

Straight ease and polish edge , done.

Show YOUR kitchen. Not the internet mystery.

For me, this is one of those things where it's a one and done job that's going to last many years and is visible every day. I would do the same counter thickness. You look to save your money when doing all the other nonessential elements with decor and hardware.

Slabs vary in color and pattern. Natural material, different lots and all. Imo, you should be involved in choosing your slabs. Which one you want for the main impact on the island. And which sections and orientation of the other slab cuts for your counters. They will go together for a complete picture right down to how any corners grain match. You can layout the pieces to get a piece of art you will look at every day. I wouldn't leave this to your contractor or even your fabricator. Layout, seams, these are steps you can request inspection and your acceptance before moving to the next step. Quartzite is super hard on expensive diamond cutting tools. They dull and can chip the edge. This can be a problem for seams. You can do a final at the shop before allowing delivery and installation. These provisions are necessary to avoid the expensive disappointments we've seen on this forum. Set all this up in advance with your contractor and fabricator. It's more important if you want a slab backsplash. You can go thinner for a backsplash.

This is a lot of effort, not just money. You get all the benefit. You can take pics of your reserved slabs. Get 11x14 blowups at Walmart. Cut them up for aesthetic orientation. See those marked on the slabs by the fabricator before cutting. He may have input. Good luck.

I stand by my first comment it depnds on many things that we have no clue about but for sure same on all counters IMO

Just stick with 3 cm for everything. You won't save much going with 2 cm because you will then have the labor to create a mitered or built-up edge. Unless you were going to just do an eased edge on the 2 cm slabs? I think mixing the two might make it look like you made a mistake.

Keep it simple with 3 cm for everything.

Thanks, yep, that's what will be done👍🏼