Sugar crystals are solid forms of sugar that occur when sugar molecules bond together in a structured pattern. They are commonly found in table sugar, which is primarily made of sucrose, a type of carbohydrate. These crystals can vary in size and shape, depending on how they are processed and the conditions under which they are formed. The process of creating sugar crystals often involves dissolving sugar in water and then allowing the solution to cool. As the water evaporates, the sugar molecules begin to come together, forming visible crystals. This crystallization process is also used in making other sweeteners, such as rock candy and brown sugar.