>> (it's not quite right)

That's a whole new thread! Most people agree that it's nowhere near right, even the guides these days admit that it's just one interpretation. They had to get a special, modern cement cement specially formulated to get the quartz to stay up there. Basically, the wall was never vertical and the pattern of inset rounded stones is, obviously a guess.

<end of thread hijack> I'm off to grab some nice wallpaper!