Rock Candy


Only requires a few simple ingredients and just a little time and patience. Here is how to do it:

You will need:

15cm piece of string
A pencil
A paper clip (or large plastic bead)
1 cup of water
2 cups of sugar
A glass jar
What to do

Tie the 15-cm piece of string to the middle of the pencil.
Tie the paper clip (or bead) onto the end of the string.
Put the pencil across the top of a jar so that the string hangs down the middle of the jar. If it hangs down too far, roll the string around the pencil until the string is not touching the sides or bottom of the jar. The string will act as a seed for the crystal. Any type of jar will do, but canning jars are best since they can endure the hot temperatures. Tall skinny olive jars are also nice because they don’t use up so much of the liquid.

Now that the string and pencil are ready remove them from the jar and put them aside.

Pour the water into a pan and bring it to boil.

Pour about 1/4 cup of sugar into the boiling water, stirring until it dissolves.

Keep adding more and more sugar, each time stirring it until it dissolves, until no more will dissolve. This will take time and patience and it will take longer for the sugar to dissolve each time. Be sure you don’t give up too soon.

Carefully pour the hot sugar solution into the jars to the top. Then submerge the paper clip and string into the sugar solution. Be sure the string hangs down in the middle of the jar.

Allow the jar to cool and put it someplace where it will not be disturbed. In a week or so you will have large crystals to enjoy!


All life is an experiment. The more experiments you make the better.

- Ralph Waldo Emerson

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Science with Mrs. Suggs

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