It's waterjet cut marble backsplash. Can't find a credit.

Here is a source for these types of stone patterns.

http://tilebar.com/collection/stone-mosaics/waterjet.html

http://moreroom.stonecontact.com/products/medallion-category/5

Are there grout lines in this backsplash?

http://www.traditionalhome.com/kitchens/10-steps-to-fab-kitchen?page=0

If you live near an Arizona Tile store, they have what they call Just Design where you can do your own from several patterns. I had them do a listelle for my bathroom vanity backsplash. I chose the pattern, then selected the individual stones. Here's a pic of my not-yet-installed listelle. All stone is marble, w/ crema marfil field, Emperador light bands & Emp. dark dots. The pencil liner to cap it is Emp. light.

That is beautiful!!!