Cut the glycerin soap base into small cubes to help it melt evenly. Then, separate into 5 separate containers.
Melt the soap base using a double boiler or microwave in 20-30 second bursts, stirring in between until fully melted.
Once melted, let the soap cool slightly for about 1 minute.
Add in 8 drops of essential oils to the melted soap base.
Add a small amount of mica powder to one bowl and stir until fully combined. Adjust color as needed.
Pour into your soap mold.
Repeat steps 2-6 for each color of soap you want.
Let the soaps fully harden at room temperature (about 1–2 hours).