Evaporite minerals are geologically important because they clearly are related to the environmental conditions that existed at the time of their deposition, namely coastal arid. They also can be easily recrystallized in laboratories in order to postulate their specific characteristics of formation. MgSO 4 - 7H 2 O . MgSO 4 - 6H 2 O . Kieserite lends its name to a group of sulfates called the Kieserite Group .
Color is white, colorless, gray or yellowish.
Luster is vitreous. Crystals are translucent. Crystal Habits include granular masses. Individual crystals are rare. Cleavage is perfect in one direction.