Don’t Believe Everything Pinterest Tells YouA few weeks ago I found this neat “instructographic” for making eggshell geodes. It all seemed very nice and clear, and I thought that it would be a great project to surprise my daughter with on her return from Germany. So a week before her return I followed the instructions and set up 4 solutions with 1/4 cup of water and 1/8 cup each of salt, sugar, Epsom salt, and Borax. I was envisioning pretty crystals forming inside the eggs as promised:
All I can say to the instructions after trying this experiment is “As if!” After a week of standing undisturbed, my eggs still had way too much water in them and not enough crystals.
- Some crystals formed with Borax (aka alum) that is known as the best substance to grow crystals at home.
- Salt produced some crystals on the rim – this solution was most over saturated with 1/4 cup of water and 1/8 cup of salt, and I put the remaining salt in the solution on the rim. That seeding seemed to help crystal growth on the rim of salt eggshell.
- I think that Epsom Salt and Sugar both were not saturated enough to produce crystals.
- Also, I think that in all eggs crystals had a hard time taking because there was no “seed”. The other instructions for egg deodes that I found online included “seeding” an eggshell by first putting some glue inside and sprinkling crystals on it, then waiting for the eggshells to dry. This is perhaps what we will attempt next year.
More Science for KidsFrom my blog:
- Think Like a Scientist – separate two unknown materials
- Backyard Chemistry
- Making Potions
- DIY Lab in a Box
- Think like a scientist – explore an unknown substance