Have you considered River White granite? I have it in my bathrooms and it has a lot of gray in it. I would have used it in my kitchen if I didn't go with Carrara marble.

Silver Pearl granite. It's a medium gray color. I saw it in person and the slabs I saw were more uniform in color than the speckled gray and white I see when I search images.

We chose to do black pearl which reads as a soft black. Ours was $62/sf installed.

Much of the Super White available etches like marble, not all, so it would be important to test each specific slab if you decide on Super White. Calacatta Macaubus Quartzite is another beautiful quarzite that is white/gray & does not etch.

I'm not as familliar with Quartz material (caesarstone, etc) but there are many threads on this forum discussing white/gray quartz material.

Fantasy Brown quartzite might be another option. Our version is very soft in color with lots of white, gray, some tans. We do have walnut cabs but it would look equally beautiful with white cabs and I think fantastic with gray! You just have to look for a soft version of FBQ rather than a more vibrant version. There is much variation. (Sorry, didn't exactly answer your question!)

We have Hanstone quartz in two bathrooms we just remodeled. Very similar to Caesarstone but Hanstone had the size of slab we needed otherwise we would have gone with Caesarstone.

White quartz material is very finicky color. It shows way more smudges than you may think. Also keep in mind edge and deck seam will be more noticeable on white or light colored quartz.

Thank you everyone. I did speak to a fabricator and he echoed the issues with Super White as not being a quartzite that has the durable properties that you look for in a quartzite (did not get into whether it really is one or not - moot point) so the lack of duribility takes that out of the running.

So unless I get really lucky and find a couple - possibly 3 - slabs of a durable natural stone that will hold up to our type of use, I am back to manmade quartz. I am familiar with most brands and loads of information on this site but nothing on the Antolini brand. Anyone have anything to share about it?

I don't know anything about the Antolini brand. My counters are Caesarstone pebble in the honed finish. It's a light gray with a very subtle pattern. I love it. Another color you might look at would be CS concrete. Both Silestone and Neolith make some gray color options also.

Look for White Ice granite. We love ours and it requires zero maintenance and is incredibly durable for our busy famuly of 5. We have white shaker cabs and BM serenity wall color.

I put Kashmir White granite in my daughter's bath. It is very grey. The granite yard told me it was a close approximate to marble (it is NOT!) It looks nice w/ her white painted cabs, but it does NOT look like the Carrara marble I have in my kitchen & master bath! Bullet-proof, though...she has spilled much nail polish on it...used remover to get it off...granite none the worse for it!