What's the name of this type of acrylic?
I did a quick search for "pearlescent acrylic sheet" and it appears there is at least one resource for this type of product. Various contours and colors are available from Acrilex and they all look quite fabulous!







I didn't capture all 44 available patterns and there is at least one that resembles the panel in the photo you've linked.

I found a couple other resources, but the images were not as suitable nor as attractive as these samples. I might have a new resource for my laser cutter now!