Did this project with 1 inch pink from that I had in storage. I cut the basic shapes on the first piece. Then used it to trace the other layers. It is stacked 4 pieces high and I used screws to hold the pieces together while the Liquid Nail sent. Once build I used a Dremel and cut off wheel to carve some of the formations in the rock face. Still aways to go but I am pleased with the results so far.
Apologize for the grainy pictures these was taken with a cell phone.