Hi Melissa! These are called "Worthless Wood" blanks. The ingredients are:
Junk wood
resin of some sort, PR or Alumilite
Coloring agent, Pearl-ex or Mica powder...others.
Mold
Pressure pot
You don't list your location, but I'd bet there is someone in your area that does these. Curtis Seebeck has a great tutorial at Turntex.com. Let me know if you have any questions!