Tuesday, December 22, 2015

Homemade geode

A few months ago we made these geodes and I forgot to write about it until now. Harriet loves doing science experiments so I have been looking on youtube and found this guy. The cool thing about this experiment is that it only takes less than a day, unlike rock crystals, which can take weeks. 

Basically you paint some elmers glue in half an egg shell that is dried out and then sprinkle some alum powder (pickling salt) in there, mix 2 cups of hot water with 3/4 of a cup of alum powder in a jar and then 30 drops of food coloring. Dissolve the alum powder, drop the egg shell in and wait 14 hours.
Its fun because the crystals are giant. (Not in the top pic that the blue doesn't have the giant crystals anymore because Harriet stowed it away in her pocket when she wasn't supposed to bring it somewhere and essentially crushed the side crystals).

We decided to experiment some more with these berries things that were on our climbing spinach plant. The egg came out kind of brownish even though the juice was purple.

No comments: