Epsomite is a mineral composed of magnesium sulfate with the chemical formula MgSO₄·7H₂O. It typically appears as colorless or white crystals and is often found in evaporite deposits, where water has evaporated, leaving behind various minerals. Epsomite is commonly known as Epsom salt and is used in various applications, including gardening and as a bath additive. This mineral is soluble in water, which means it can dissolve easily, releasing magnesium and sulfate ions. Epsomite is also important in the study of mineralogy and geology, as it helps scientists understand the processes of evaporation and mineral formation in different environments.