Saucer or shallow dish ( plastic petri dishes works, too)ġ.Alum (you can often find this in the spice aisle of the grocery store).You can grow single, large crystals that look like gems by using a seed crystal. To grow large single crystals, you’ll need to follow the evaporation procedure in the next project. Crystals grown this way will be small, thin, and numerous. As the solution cools, the magnesium sulfate atoms run into each other and join together in a crystal structure. Cooling the solution rapidly encourages fast crystal growth, since there is less room for the dissolved salt in the cooler, denser solution. The temperature of the water determines how much magnesium sulfate it can hold it will dissolve more when it is hotter. Epsom salt is another name for the chemical magnesium sulfate.
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