This is a soap I made last week.
The bottom layer is colored with Moroccan Red Clay and a touch of red oxide.
Right after I poured the bottom red layer, I evenly sprinkled red clay across it, to form a line between the red and the uncolored soap. I let the bottom layer set for about 20 minutes before carefully pouring the top layer. If you don't let it set up a little, when you pour the top layer it will go through to the middle of the bottom layer. I wanted a nice straight line.
Scented with Apple Orchard fragrance oil from Nature's Garden.