It's an elongated glass tile called Vihara eHex Kiri Iridescent, with a row of textured flannel limestone at the bottom. That is a display in our showroom if you're local and want to see it in person. Thanks.

I'm actually not local. Unfortunately. What did you use to terminate the vertical edge of the eHex tile. Is that a Schluter trim?

It's actually done with limestone that's been bullnosed - the same stone used in the lower band at the bottom of the backsplash.