Make Your Own Geode Eggs
Geodes are limestone rocks with quartz crystals growing in their center....ordinary on the outside, spectacular on the inside.
If you are doing a study on geology, what better craft than creating your own "geode."
Ingredients:
water
borax* (Mule Team 99 is one brand)
clean egg shells halves
egg carton
waxed paper
Directions:
1. Create a super-saturated solution of borax and water -- fill a jar with boiling water then add borax one tablespoon at a time until no more will dissolve. This will be about three tablespoons per cup of boiling water.
2. Place small pieces of waxed paper in the egg carton sections.
3. Set the clean egg shell halves in the carton on top of the waxed paper.
4. Pour a small amount of the super-saturated borax solution into the egg shell halves.
5. In a few days, or less, crystals will form inside the shell.
*You can use other solids to make super-saturated solutions with. The ones that I've used are: table salt, rock salt, sugar, baking soda, and Epsom salts. Each of these will create a different looking crystal and will require a different ratio of water to solid, and will require a different number of days to form. Makes an interesting science project.
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