Ferrous Sulphate Crystals finds application as a reducing agent for reduction of chromate into cement to less toxic compound. In combination with other compounds, they are also used for fortifying food supplements that are intended to be consumed for treating iron deficiency. These crystals also serve as mordant for dyeing wool and in formulation of inks as well. They are known to have chemical formula FeSO4 with molar mass of 151.91 g/mol with light blue color appearance. Ferrous Sulphate Crystal is also utilized as lawn conditioner for horticulture practices.