Skip to main content

How to Make Crystal Geode Rocks

These sparkly geode rocks are a fun, sciency experiment to make with the kids

Published on: July 25, 2018

How to Make Crystal Geode Rocks

Kid doing a science experiment

Here comes the science bit

Dissolving a salt, such as Epsom salts, in water forms a solution. Heating the water creates space between water molecules so that the water can hold more salt. When the hot water won’t dissolve any more salt, the solution is called “saturated.”

As the saturated solution cools, the salt is pushed back out of the water as a solid. As the water evaporates, the salt crystals are left behind. When the water cools, the crystals will fall out of the solution and collect at the bottom of the bowl.

Related Topics

Share this article with your friends!

Leave a Comment