How to Make Rock Candy


Step 5: How it works

Picture of How it works
By heating and agitating water while adding sugar, a saturated liquid is formed. As the syrup cools and evaporates, the fluid becomes super saturated - meaning the water has more sugar than it can hold. When this happens, sugar looks for a place to escape - these places are called nucleation sites and sometimes called "seeds."

The string provides the nucleation sites for crystal growth. As the water evaporates, more sugar crystallizes on the string - growing the rock candy.
Remove these adsRemove these ads by Signing Up
csk144 years ago
Can you color the candy?  Maybe put food coloring in the water or ad a fruit.
Goygar csk142 years ago
Adding food coloring or fruit gives no real problems. But to flavor the candy, it is best to add a candy flavoring or an extract of some flavor.
namraps4 years ago
Maybe I'm missing it, but I saw nothing about the amount of sugar.
trebuchet03 (author)  namraps4 years ago
Step 2

Keep adding sugar until vigorous stirring does not dissolve additional sugar.
brazilian sugar works?
its sweet literally! :D I need 2 make some! actually my friends made rock candy for science class, they wanted to make flavored rock candy and used kool aid instead of sugar. I guess because it was so sugary because of the kool aid it grew bigger faster! I wonder about ice tea rock candy?
supercheap5 years ago
i like your action-scripty shirt
mason01906 years ago
yum but does it need to be heated or just stirred
sector476 years ago
mooses236 years ago

Get More Out of Instructables

Already have an Account?


PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.

Upgrade to Pro today!