-20-10 Identify the mineral  30: This mineral, chemically named Calcium Sulfate dihydride, naturally occurs in extensive beds associated with other evaporite minerals like anhydrite and halite, particularly in Permian and Triassic sedimentary formations, as a result of the evaporation of ocean brine.  20: The fine-grained massive variety is called alabaster, while in well- developed crystals the mineral commonly has been called selenite. It is an important constituent of cap rock an anhydrite forming a covering on salt domes; it also occurs dis
-20-10 Identify the mineral  30: This mineral, chemically named Calcium Sulfate dihydride, naturally occurs in extensive beds associated with other evaporite minerals like anhydrite and halite, particularly in Permian and Triassic sedimentary formations, as a result of the evaporation of ocean brine.  20: The fine-grained massive variety is called alabaster, while in well- developed crystals the mineral commonly has been called selenite. It is an important constituent of cap rock an anhydrite forming a covering on salt domes; it also occurs disseminated in limestones, dolomitic limestones, and some shales.  10: This mineral is of reat commercial importance. Crude forms are used as a fluxing agent, fertilizer, filler in paper and textiles, and retarder in portland cement. About three-fourths of the total production is calcined for use as plaster of paris and as building materials in plaster, Keene's cement, board products, and tiles and blocks. The Gypsite is the earthy pulverulent variety.
-20-10 Identify the mineral  30: This mineral, chemically named Calcium Sulfate dihydride, naturally occurs in extensive beds associated with other evaporite minerals like anhydrite and halite, particularly in Permian and Triassic sedimentary formations, as a result of the evaporation of ocean brine.  
{Gypsum}