April 3, 2012
We made these crystal egg geodes using egg shells, alum, glue, water, and food coloring. The directions are from Martha Stewart. I did not follow the directions very closely, as I did not want to take so long to finish the project, nor was I willing to spend the amount of money needed to buy enough alum to do six batches of these. So I doubled the growing solution recipe and then divided that evenly between six small mason jars. It worked just fine and we were very happy with the results. I would also like to mention that when we microwaved the solution to further melt the alum, it actually made more crystals form on the bottom of the container. So I recommend that you don’t microwave the solution.
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