Introduction: How to Make Rock Candy

Picture of How to Make Rock Candy

I show how to make rock candy. Rock candy or rock sugar is a type of confectionery mineral composed of relatively large sugar crystals. This candy is formed by allowing a supersaturated solution of sugar and water to crystallize onto a surface suitable for crystal nucleation, such as a string, stick, or plain granulated sugar. Heating the water before adding the sugar allows more sugar to dissolve thus producing larger crystals. Crystals form after 6–7 days. Food coloring may be added to the mixture to produce colored candy.

When the rock candy is growing do not disrupt the jar because it can stop the forming process of the crystalline structure. It may not prevent it from working, but it will hinder the progress of the crystal growth. If you do not see any crystals growing on the skewer after a few days, boil the water again, and try to mix in more sugar. If more sugar does mix in, you did not add enough when you were mixing in the sugar at the beginning. You can start again with the now fully-saturated solution.

Step 1: Ingredients/Materials

- 3 Cups Granulated Sugar

- 1 Cup Water

- Flavor (Optional)

- Food Coloring

- Thin Tall Glasses/Jars

- Clothing Pins

- Wooden Skewers

- Medium Saucepan

Step 2: Watch the Video

(The video may not show up for mobile viewers)


About This Instructable



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