Instructions

In a bowl, combine the dry ingredients and stir well. Divide evenly into 3 smaller bowls.
Melt 1 tablespoon coconut oil in a cup. Add 2 - 3 drops of food coloring and stir well. You won't really be able to see the final color until mixed with the dry ingredients, so just use your best guess. Add approximately 1/3 teaspoon almond oil (eyeballing it is fine!) and 5 - 10 drops of the essential oil of your choice.
Pour the coconut oil mixture into one of the bowls of dry ingredients. Use your hands to mix it all together, breaking apart chunks as you go. If you would like to adjust the color, melt a little bit more coconut oil and stir in the dye. Then pour it into your bath bomb mixture and continue mixing.
Do this, except with different food coloring, for the two remaining bowls.
Pack the mixtures into whatever mold you like (I used plastic fillable balls from the craft store), layering the colors on top of each other and along the sides of the mold. If using a ball mold, pack each side until overflowing, and squeeze both halves together to close.
Freeze for 20 minutes. To remove the bath bomb from the mold, warm the sides of the mold with your hands (this will help melt the coconut oil) and squeeze either side until the bomb pops out. Sprinkle with mica for a little shimmer.
To use: fill your tub with warm water and drop in the bath bomb. It will fizz and release the scent and all the skin-softening agents. Soak for 20 - 30 minutes.