It depends on the material and size. For example, that’s just a piece of quartz but fairly large. For this cut you would want a medium to large sized stone, something like at least 8mm in diameter. A good piece of Topaz might run anywhere from $100-$450 depending on color and size.

I’ve cut this particular cut in Topaz and Quartz (above). I tried it in CZ to see what it might look like if it were cut in diamond, but the pattern is totally washed out by the light return, so likely higher RI will likely not work as well as a more color saturated stone.