Science, Tech, Math › Science How to Make a Crystal Skull Share Flipboard Email Print Anne Helmenstine Science Chemistry Basics Chemical Laws Molecules Periodic Table Projects & Experiments Scientific Method Biochemistry Physical Chemistry Medical Chemistry Chemistry In Everyday Life Famous Chemists Activities for Kids Abbreviations & Acronyms Biology Physics Geology Astronomy Weather & Climate By Anne Marie Helmenstine, Ph.D. Chemistry Expert Ph.D., Biomedical Sciences, University of Tennessee at Knoxville B.A., Physics and Mathematics, Hastings College Dr. Helmenstine holds a Ph.D. in biomedical sciences and is a science writer, educator, and consultant. She has taught science courses at the high school, college, and graduate levels. our editorial process Facebook Facebook Twitter Twitter Anne Marie Helmenstine, Ph.D. Updated November 16, 2019 Learn how to make your own crystal skull, for Halloween, Day of the Dead, or just decorating your space. It's an easy crystal-growing project that produces an interesting conversation piece. Crystal Skull Materials We chose borax to grow the crystal skull, but you could use any crystal recipe. One interesting option might be to grow a sugar crystal skull and place it in a punch bowl. BoraxBoiling waterSmall paper skull (I got mine at Michael's craft store)Bowl deep enough to hold the skull Crystallize the Skull Make sure the bowl is deep enough to hold the skull.Pour boiling or very hot water into the bowl.Stir in borax until it stops dissolving. This project looks cool with clear crystals, but if you like, you can add food coloring to color the crystals of the skull.Place the skull in the bowl of crystal growing solution. Paper or cardboard skulls take a while to absorb the liquid, so the skull may float for a while. This is fine and usually resolves on its own, but you can weight down the skull with a glass or another bowl if it bobs up too much. Another option is to turn the skull periodically to make sure all surfaces get exposed to the liquid.Check the progress of crystal growth every couple of hours. You should have a nice crop of crystals within an hour to overnight, depending on how saturated your solution was and how quickly it cooled. When you are satisfied with the crystals, remove the skull and place it on a paper towel to dry.If you want even more crystals on the skull, take the crystal skull and place it in a fresh solution to get a second layer of crystal growth. Make sure the new solution is saturated (no more borax will dissolve) or you'll risk dissolving some crystals rather than growing more.