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How to Grow Alum Crystals

How to Grow Alum Crystals
  Anne Helmenstine
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Alum crystals are among the easiest and quickest crystals you can grow. Simply mix 1/2 very hot tap water with 2-1/2 tablespoons of alum. You can get alum from the spice section of the grocery store or with canning and pickling supplies. The crystal growt

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