The elements in copper sulphate are copper, sulphur and oxygen. Copper sulphate is a compound, made up of three elements. Colored Crystals You can Make at Home You encounter crystals, like salt and sugar, almost every day of your life. 2  While these crystals are not colorful, there are a number of colored crystals that occur in nature…. 3  How to Make a Copper Sulfate Solution Copper sulfate is a reagent used in many applications.