It is glass mosaic tile. Cindy from Chairma Design was the designer on this project. She would have all of the details. Glad you like it!

We
are a premium online supplier of metal mosaic tiles for backsplash and other
wall applications. We offer tiles that look similar to the metal backsplash
tiles in the picture.

Eden Mosaic Tile Installations: Modern Random Mix Steel/Glass II Tile · 詳細

Eden Mosaic Tile Installations: Random Mix Steel - Glass II Tile · 詳細

Eden Mosaic Tile Installations: Grey Blends Thin Lines Aluminum Tile · 詳細

Feel
free to check out the other tiles we carry at this link: https://www.houzz.com/pro/edenmosaictile/eden-mosaic-tile

We
invite you to browse our customer installations of metal backsplash in case you
are looking for some ideas: http://www.houzz.com/projects/72838/eden-mosaic-tile-installations.

We
offer the possibility to receive samples. All the best with your design!