This is a coaster set that I designed based on the movie "The Fifth Element".
After printing, I did the following to create a stone look:
1) Single coat of almond spray paint.
2) Single (relatively thick) coat of Rustoleum Stone "Sierra" texture spray paint.
3) Two coats of Rustoleum Matte Clear.
A walk-thru of the design in Fusion 360 is available here: https://youtu.be/IgwrDq19Nuo