CHeck this thread
The tile backer, sealant, tile, thinset and grout was about $650.
When you figure the tile get 15% more than you need as measured.
When you saw tile wear eye protection especially if it’s glass tile like I used.
But how about colored mica in resin? You’d have to dry fit all the panels then resin flat, then assemble. It would be cheaper and lighter. Just a thought.