9. Separately stir a small amount of mixed cement with the desired amount of colorant into a container for each color you wish to use.
10. Empty the newly created colors back into the larger uncolored mix and gently swirl together until you're satisfied with the effect (be careful not to over-mix).
11. Slowly and evenly pour cement into mold. Lightly tap along the outside of the mold to release any air bubbles and let the cement settle flat. DO NOT MOVE MOLD WHILE CEMENT IS DRYING.
12. Allow stone to rest undisturbed for at least 5 hours. Once stone has dried, remove it from the mold, carefully peel off the contact paper and clean off any smudged cement on the glass with wet a sponge, scouring pad or scraping tool.