Mix together the French green clay, pigment, glycerin and rose hip oil until it is a smooth paste.
Chop the soap into chunks and melt in microwave.
Once soap is fully melted stir in the clay paste until smooth and evenly distributed.
Place molds on a tray or board.
Add the essential oil just before pouring and gently stir in, them fill each mold with the melted clay soap.
Allow to cool until firm, then turn over and pop soaps out of molds.
Leave to fully harden, will take at least an hour.