1, the raw materials are different, the main raw material of icing sugar is white granulated sugar or sucrose, while the raw material of white sugar is sugar cane and sugar beet squeezed out of the syrup.

2, the production process is different, rock sugar is mixed with the right amount of sugar or cane sugar and water, after re-soluble, washing, crystallization and other processes produced; white sugar production process is mainly juicing, drying, crystallization.

Icing sugar and white granulated sugar are two commonly used flavoring sugar, they are similar to the use, but the difference is still relatively large, the two in raw materials, production process, color, shape, taste have certain differences. Relatively speaking, rock sugar is an upgraded product of white granulated sugar, which is made from white sugar dissolved again and made through the steps of washing and recrystallization.