Easy Alum Crystal Growing Project

Alum cystal

Ude/Wikimedia Commons/CC BY-SA 3.0

Are you looking for an easy, safe, reliable crystal-growing project? These alum crystals may be the easiest crystals you can grow.

Why This Project Rocks

  • Non-toxic crystal (alum is a spice)
  • Uses hot tap water, not boiling water
  • Easy to do—mix and wait
  • Extremely reliable results—crystals will grow
  • Only requires a few hours for good crystal growth
  • Results in crystals large enough to pick up and examine

Grow Easy Alum Crystal

To grow these crystals you will need:

  • 1/2 cup hot tap water
  • 2 1/2 tablespoons alum

Simply stir the alum into the water and wait for crystals to grow. Alum crystals usually are visible within a half an hour and reach a good size within a few hours. It's that easy! When the crystals are to your liking, use a fingernail to scrape them off the side of your container. You can examine them and keep them.

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Your Citation
Helmenstine, Anne Marie, Ph.D. "Easy Alum Crystal Growing Project." ThoughtCo, Aug. 27, 2020, thoughtco.com/easy-crystals-to-grow-606263. Helmenstine, Anne Marie, Ph.D. (2020, August 27). Easy Alum Crystal Growing Project. Retrieved from https://www.thoughtco.com/easy-crystals-to-grow-606263 Helmenstine, Anne Marie, Ph.D. "Easy Alum Crystal Growing Project." ThoughtCo. https://www.thoughtco.com/easy-crystals-to-grow-606263 (accessed January 24, 2021).