Hi Stacey, sorry for the delay in responding - I have been out of the office.
The splashback is a marble mosaic tile in ming green and white.
I found it incredibly difficult to source in Australia - and when I found a supplier I bought the last of their stock.
It is absolutely stunning and so worth the effort to track it down. I think it may be available if ordered and its called - Ming green and Thassos marble. Byzantine Tiles are one of the only suppliers I found for the tile.
hamilton+mcCabe design associates