Holiday Crystal Trees

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"Magic Crystal Tree." Image:

One of our readers, Heike Kubash recently pointed me toward a web site with instructions on how to make "magic crystal trees," something I remember from my boyhood. I remember seeing kits for these kinds of projects where you would place rocks or pieces of wood in a bowl, cover them with a special solution, and gradually a layer of frost-like crystals would cover them.

Over at, you can find a project for making magic crystal trees, but using ingredients from around the house or the supermarket. In keeping with the season, the "trees" are made of cardboard, cut in holiday conifer forms. The fluid soaks through the cardboard and as the solvent evaporates, crystals of table salt and Mrs. Stewart's Bluing precipitate on the cardboard creating the effect of snow or frost.

It's a fun project to do with the young ones over the holidays. For the full instructions for the project, click here.

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One Response to Holiday Crystal Trees

  1. Jim Hannon says:

    The effect is called efflorescence.
    I remember something similar to this where you put crystals of chemicals like copper sulfate in a solution of sodium silicate. most silicates being insoluable the copper sulfate crystal would dissolve and form tendrils of copper silicate.

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