Step 12:

Using a spoon, remove each egg shell from the solution.  Pour off any extra solution and place the egg geode on some paper towels to dry. 
<p>i tried it, with regular school glue then covered it with alum powder (or tawas in Indonesia), but after i left it a day after, the glue and alum became fluid, not dried so i think it failed. what steps did i miss ? or i cant use some regular glue ?</p>
<p>you suck thats why</p>
<p>just kidding same thing happened to me</p>
School glue is water soluble, so the water in the experiment will dissolve the glue. You need a stronger non &quot;Washable&quot; glue to make this work. I hope you find what you need, a white glue that is<u><strong> not </strong></u>&quot;Washable&quot;. Good luck!<br>
I only had Elmer's washable glue to use for alum powder to adhere to eggshell. I checked around 12 hour mark and they will know crystals. Not even tiny ones. Is this because of the washable glue that was used? Did blue and alum powder get washed away after soaking in the solution? Can I use Gorilla Glue?
I went to Kroger &amp; bought the cheapest school glue I could find, so it was not Elmer'S brand but it worked. We also tried plastic eggs &amp; real shells. I'm trying to download the pictures now from my phone
<p>the crystals will still grow with Elmers glue, my son is currently doing this as a science fair project. the glue has to be completely dried before putting in the alum solutions and also make sure that while the glue is wet you COVER it with alum. We did variables and it will not grow crystals if the alum powder is not on there. The solution takes about 3 days to see the crystals but they will begin growing up &amp; out. we have now been growing them almost 2 weeks (His project is due Monday) &amp; the solutions is almost gone. Try it again its really cool &amp; experiment with colors, different dyes and mixing colors</p>
Thank you. The Elmer's glue you had, was it washable kind? I did find some nonwashable Elmer's glue online. Can you post a picture of your son's egg when done? I would love to see it.<br><br>I painted eggshell with the washable glue and covered with alum powder and let dry over night. I left eggshell in alum solution since Thursday in hopes that the crystals would form . . . still no luck.<br><br>Maybe my soution not saturated enough, maybe it was yhe washable glue. I will try again.
Sorry, for typo. At 12 hour mark, I did not see any crystals. Not even tiny ones.
Gorilla glue is activated by water. I just learned that, so I don't know. Sounds like an experiment to me. Hope you success. Thanks for asking.
<p>Thank you for your reply. I will try again with non-washable white glue. Good thing I was able to wash off the washable glue and alum powder from goose eggshells that I bought online. Will try again today. The kids and I cannot wait! This is a wonderful project, thanks for posting this. If I can actually make these crystal egg geodes . . . I will do this project with my Girl Scout troop. I am keeping my fingers crossed. Thanks, again. </p>
<p>after the crystals are grown, can you peel off the egg shell?</p>
<p>I think you would loose the color. The color seems to be in the shell not the crystals themselves. I just tried and every time I peeled a little shell away the crystal came with it. They really stick to the shell. Sorry.</p>
<p>I think the shell is what gives it part of it's &quot;rock&quot; look. Play around with some paper mache and spruce it up a bit!</p>
<p>heidisatwork, I think you can, but I just saw this now</p>
<p>I am sure you can, but I think you will loose the color and I don't know if the crystals will keep the shape of the egg. Should be a great experiment. Thanks for asking.</p>
<p>can you use food coloring instead of the dye pills?</p>
<p>I used food coloring and got an INTENSE coloring. it takes about 30 drops, so I suggest buying a large bottle and using a teaspoon. :-)</p>
<p>I'm in the process of making one of these, but instead of using a real egg, I went out and bought a few of those giant (3 inches deep, 5 inches long) plastic easter eggs with a colored bottom and clear top. I'm hoping to get a giant 'geode' with a clear removable lid for keeping it safe and displaying it!</p>
<p>how did that work out? It's a clever idea.</p>
Can you do this without food coloring? Like with paint?
Hi we are doing this for a science project as well and I was wondering if we wanted to show the different mediums like borax for instance-- am I still soaking them completely and do I include the alum with the other mediums? Thanks!!
You can if you use exactly the same amount of alum with each other medium. Use the metric system and use a scale to measure it. What is you hypothesis? What are you trying to discover? With that info I would know how to better answer you question. Hope to hear from you soon.
Im in the process of making these eggs but i was also wondering, do you think i can make them in clam or oyster shells? Thanks :)
Sounds like an experiment to me&gt; Why don't you try and let me know the results. I can think of no good reason why it shouldn't work. Thanks for asking.
About how long does this take? I'm doing geodes for a science project and only have a few months so i dont want anything longer than a month to grow. If you could answer back thanks
These crystals take a couple of hours. You can watch them grow. Thanks for asking. By the way what is your hypothesis?
<p>Can you NOT use alum and still make crystals?</p>
You can make crystals from sugar like found here: <a href="https://www.instructables.com/id/How-to-Make-Sugar-Crystals-on-a-Stick/" rel="nofollow">https://www.instructables.com/id/How-to-Make-Sugar-Crystals-on-a-Stick/</a> or from salt, basically the same as sugar. Thanks for asking
These would make nice decorations or conversation starters. I wonder what would work besides eggshells?
You may not get as intense a color with food coloring. You should try it and see. Let me know how it went. Thanks for asking.
<p>interesting, but how is it supposed to come out, in the way you showed. And we do not have to break these, neat.</p>
exelente gracias por tu ayuda!!!!!
<p>Su bienvenida</p>
<p>i made this for a school priject and hope get first placed </p>
<p>I hope you do too. Good luck, and thanks for commenting!</p>
I seen the finished product on Pinterest when I was first informed of the link. I have searched for this in books,online,etc. SOooooo very happy to find it, I think they are great. Congrs. on a great job.
Congratulations on taking First Place in the egg challenge. Very cool project that I will for sure try.
Thanks, it really surprised me. Lots of fun though.
you could also make a deep bowl and just poke the holes and put the alum into the holes to keep the egg whole because then you could crack the egg like a real geode, it'll look like a real egg and you can crack it to the candy inside
Try it and let me know how it goes.
it looks so good
Thank you for looking.
Great instructable although your definition of super saturated is not quite correct. When a solution can hold no more medium at the current temperature then it has become fully saturated. A solution is super saturated when the solution is fully saturated at a higher temperature and then allowed to cool. This then allows the solution to hold more medium then if it had just been saturated. This is super saturated.
I stand corrected, Thank you for commenting and looking.
i found that alum crystals make a great antipersperant
Yes it does! Thanks for looking.
These are so neat looking! This would be so fun to do with kids - though they might need to learn patience. :D
The patience results from making sugar crystals at a 1 week wait. Thanks for looking and commenting.

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Bio: In a valiant attempt to keep myself from dying of boredom, I create.
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