The one in my original post is Mykonos.

This is the Chamonix. Like I said, it looks gray in the photo but it’s not all grey. Mykonos might be grayer/muddier.

You must personally test these "quartzites" for porosity and for authenticity. No, the word of the salesperson or fabricator isn't good enough. Houzz is littered with threads of quartzite horror stories, even from the real thing. Lots of this stuff is simply not countertop material and the burden is upon you to find out. You have been warned.

That is scary. How does one go about testing a slab at a stoneyard?

I like the Mykonos better than chamonix, the movement is beautiful and more visually interesting

editrix3:

Karen mt. is a geologist for the Natural Stone Institute. She's written extensively about testing here and elsewhere. Google a bit please.