Why yes, it looks like I could.
This is Premo Gold polymer clay, tinted with the 'Kato Color Concentrates'. I like it a lot.
I experimented using two of my texture sheets, Shingle Cracked Growth Ring, and if you look to the edges, Green Sea Urchin.
I didn't sand this piece. I like the tiny bit of texture that remains after the mokume gane process.
If you would like more information on the process, here is a great tutorial on the web site Polymer Clay Central:
4 Color Mini Mokume Gane