Under special conditions, it is possible to get the solid to come out of the solution again, and at the same time grow into the most beautifully-shaped crystals.
How can you get a crystal to grow instead of dissolving? The answer is to begin with a solution that is so concentrated that no more solid will dissolve in it. Use something of the same substance that you made the solution from. For example, in a sugar solution use a boiled sweet.
