Geology Crystal Slime

My busy boys love studying rocks. It’s one of their favorite unit studies and I often find them pulling out their rock collections and playing. In the past we have made rock and gemstone sensory bins, but this time we decided to incorporate our favorite new medium for sensory exploration, slime! Introducing the most beautiful slime you have ever seen, Geology Crystals Slime.

Check out our Geology Gemstone Slime 

To compliment a unit study in geology we created a geology gemstone slime and it turned out beautifully! A great hands on exploration and learning slime.

We love collecting gemstones and rocks. It’s a family thing we all participate in, and we have quite the collection! Personally my favorites are quartz, amethyst, jasper, emeralds, and sapphires. When the boys recently pulled out all of their rocks and gemstones to play and explore, I decided to try something a little different.

Normally I create a sensory bin type of set up with the rocks, but our sight words slime was such a big hit I wanted to try making a slime inspired by our love of rocks.

It is the most beautiful slime we have ever made!

It is also my personal favorite. I loved playing with the slime and watching the light playing off the crystals and the slime. It moved easily and comfortably in my hand, and was generally a very soothing and stunning slime to explore.

Always make sure you are making and using slime safely.

Slime safety and tips. Everything from understanding ingredients (and how they vary) to tips about soap residue. What you need to know about slime.

Supplies to Make Geology Gemstone Slime

Clear Elmer’s School glue
Food coloring
Baking soda
Buffered saline
Small rocks and gemstones


My boys have a rock tumbler and the rocks they polished with the tumbler were a great size, but rocks with a less polished finish stick better in the slime. The choice is yours which rocks and stones you incorporate, but it was fun trying out all the different types to see how they worked in our slime. Just make sure the rocks are clean and not breaking down in anyway.

HOW TO Make Geology Gemstone Slime

Add 1/2 cup of glue to a bowl (or one regular sized bottle), sprinkle with 1/4 teaspoon of baking soda. Mix well. Add a few drops of food coloring of your choice and mix.

Start incorporating the buffered saline a few drops at a time. Mix well each time you add a few drops. Once it starts to pull together add some saline to your hands and pick up the slime to start working it with your hands. It will start out very sticky, but as you knead and work it, the stickiness will go away.

Once you have a nice slime incorporate your favorite rocks and gemstones.

Explore and play with your geology gemstone slime!

One of the ways we enjoyed playing with this slime was to incorporate various stones, then have someone else try and identify them as they played with the slime.

It was a little science, a lot of sensory and a very relaxing and entertaining activity.

When you are all done, you can take your crystals out of the slime and rinse them with water. Set them out to dry so they are ready for your next stone, crystal and rocks exploration session.

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