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5 from 1 vote

Geode Bath Bombs

Transform your bath time into a luxurious spa experience with these beautiful geode bath bombs. They're surprisingly easy to make and only require a few simple ingredients.
Cook Time20 mins
Setting Time1 d
Total Time1 d 20 mins
Course: Crafts
Servings: 8 bath bombs


  • Large bath bomb molds
  • Whisk
  • Small jar with lid


  • ½ cup baking soda
  • ¼ cup citric acid
  • ¼ cup cornstarch
  • ½ cup Epsom salts divided
  • 1 tsp silver-grey mica powder
  • 1 tsp purple mica powder
  • 1 tbsp sweet almond oil
  • ½ tbsp water


  • Add baking soda, citric acid, cornstarch, and ¼ cup of the Epsom salts (set aside the remaining ¼ cup of Epsom salts) to a large bowl and stir well with the whisk.
  • Add the sweet almond oil and water to a jar with a lid and shake well.
  • Very slowly add the liquid to the dry mixture, while whisking the entire time.
  • Take out ⅓ cup of the mixture and add it to a smaller bowl.
  • Add the silver-grey mica to the mixture in the larger bowl and stir until the color is solid.
  • Fill one bath bomb mold halfway with the mixture, then press around the sides, until the entire mold is coated in the silver. Repeat for the rest of the molds.
  • Add a spoonful of the non-colored mixture into the middle, then press down, making sure that you can still see the silver-grey edges.
  • Allow bath bombs to set for a day, then unmold by gently pushing from one side until they release.
  • Add the purple mica powder to the Epsom salts that you had set aside, and stir until the color is solid.
  • Add a small spoonful of Epsom salts to the center of each bath bomb, making sure that you can still see the edges of the silver-grey and the white.
  • Store upright in a flat container.