Bath bombs,  Gift ideas,  Intermediate,  Tutorials and recipes

Learn how to make geode bath bombs!

DIY geode bath bombs DIY geode bath bombsWhat’s this? A Bath-o-lith in the tub?

Have you heard of Bath-o-liths? These beautifully hued rocks are made of salts and powders. When you place them in water, they bubble up—and some even make a lovely foam! Geologists, never fear: No, we haven’t discovered a new, strange, and wonderful mineral… we’ve created a new recipe for geode bath bombs!

Easy enough to make, these DIY bath bombs look like beautiful crystals and are also a great gift idea (you can give them to yourself, of course!). What’s more, this bath bomb recipe is highly adaptable: you can choose whichever colour(s) you please or add a touch of mica for an extra sparkle. Whatever you come up with, we’re sure it will “rock!”

But watch out, once you’ve started making these “mineral” bath bombs, it’s very hard to stop. At Coop Coco, Bath-o-liths are our new passion. You’ve been warned!

How to make geode bath bombs

Before you begin

Due to the acidic pH of citric acid, it is important to wear gloves when making bath bombs. The citric acid is neutralized when mixed with sodium bicarbonate (baking soda); once your bath bomb is finished, there’s no need to worry!

Ingredientshomemade geode bath bombs

Bath bomb portion

Geode portion


Good to know!

  • For a foaming bath bomb, add 14 g of cream of tartar (to stabilize the foam), and 25 g of SCI (to create the foam) to the bath bomb portion.
  • To make your DIY geode bath bomb sparkle, you can add 0.2 g of the mica of your choosing to the coconut oil.
  • The Epsom salt can be replaced by another salt of your choosing.
  • If you’d like to replace the coconut oil in this recipe with something else, choose another oil that is solid at room temperature or a vegetable butter. This will ensure that the salt holds well in the bath bomb.

Steps to follow

  1. Prepare and disinfect your equipment and workspace.
  2. Melt the coconut oil for the bath bomb portion. Mix with the essential oil or aromatic essence in a ramekin.
  3. In a bowl, weigh the citric acid and baking soda. Add the SCI and cream of tartar, if using. Mix to make bath bombs
  4. Add the oil from step 2 to the powders and mix well.
  5. Spray the mixture five times with water then mix well by hand (wearing gloves). Repeat until the mixture takes on the texture of damp sand. Spray with water no more than 5 times before mixing. Otherwise, the mixture may begin to foam.geode bath bombs recipe
  6. Place the bath bomb portion in the molds and compact the mixture against the walls.bath bombs recipe
  7. Divide the salt into three bowls as follows: 40 g of uncoloured salt; 40 g of lightly coloured salt; 20 g of deeply coloured salt. The number of drops of colourant that you add to each bowl will depend on the shade you’re after!making bath bombs at home
  8. Melt the coconut oil for the geode portion.
  9. Cover the bath bomb portion with the uncoloured bath salt. Pour a little melted coconut oil over it.DIY bath bombs
  10. Repeat step 9 with the two other shades, such that the darkest colour is mainly in the center of the geode bath bomb. Before pouring the last bit of coconut oil, you can add the mica to it, mix well, then pour (this is optional).
  11. Allow your homemade bath bombs to dry for 24 hours, then unmold by turning the mold upside down. If the bath bombs do not unmold on their own, it is best to tap the underside of the upside-down mold with the back of a spoon.  

Use and conservation

Run a nice hot bath and place your DIY geode bath bomb in the water. Let dissolve then… Enjoy!

Made in optimal sanitary conditions, the product should keep for 3–6 months.

Store in an airtight container in a dry place.

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