How to Make Rock Salt

Fill a large pot about half way full of water and place on the stove burner.

Turn the stove burner on to a medium heat and heat the water. While the water is heating up, stir in as much salt as you can.

Continue adding salt to the hot water until the water reaches a boiling stage. Once the boiling water reaches the stage where you cannot add more salt, remove the mixture from the stove burner.

Let the salt mixture cool at its own pace. As the mixture cools and the water evaporates, the salt will form crystals.

Cover a table with newspapers and place the cold rock crystals on the newspaper. Use a hammer and crush the salt crystals into small pieces. You now have rock salt.