I know emsers in tulsa ok sells it. There is an exact match of size& color called cascade & another color in same color family but a tiny bit lighter called crystalline.

Emsers in tulsa ok has crystalline color on left and cascade on right. Both can come in rectangle or square or subway size. Cascade matches this pic and crystalline reminds of the ocean water in playa del Carmen. Kind of a clearish aqua color.

The closest we have to that is this http://www.glasstilestore.com/shop-by-colors-now/blue/loft-blue-gray-polished-3x6-glass-tile.html

I would suggest you get a few samples and compare them in your space as glass tile tends to reflect the surrounding hues and take on a slightly different tint in different spaces. Here is a link to our greens section if you want to take a peek, but its worth looking at the blues as well. We would love to work with you to find the right tile for your project so please contact us if you have any questions. This really is a beautiful shower!
http://www.subwaytileoutlet.com/categories/Green-Glass-Subway-Tile/

I love this emerald green glass tile! Gorgeous design!!