Step 2: Prepare crystal growing solution

Picture of Prepare crystal growing solution

For one egg shell geode make about 1/4 cup of solution.  Start with hot water and dissolve as much salt as you can.  Stir well and heat water as needed to make a saturated saltwater solution.  Keep adding salt until you get a few undisolved grains of salt in the bottom of the pan.  Add food coloring if desired.

Void Schism4 years ago
Copper Sulphate works well and forms really deep blue rhombic crystals. I used to buy it over the counter at my village pharmacy.
you can also buy copper sulphate at the big box home improvement stores. it usually goes buy septic root killer its usually 99% copper sulphate
wombatmorrison (author) 4 years ago
Yes, though I've only used salt and magnesium sulfate (epsom salt). I think sugar should also work, but I wouldn't eat sugar crystals grown on plaster, who knows what trace chemicals might leach out into the sugar.
moochaka4 years ago
So this is like the same as rock candy solution, but with salt(or other crystal-forming substance), right?