aldoha for mining. al doha for mining was founded in 2010 with the mission of serving the micronized calcium carbonate sector in various capacities manufacturing and production capabilities will be completed by the end of 2017 our 6800m2 enclosed manufacturing facility is located in beni suef industrial zone.,calcium carbonate arrmaz,calcium carbonate. calcium carbonate is one of the most abundant minerals and is the main constituent of limestone. most calcium carbonate occurs as limestone, however, heat and pressure can result in the metamorphic form, marble. calcium carbonate is generally mined as limestone or marble depending on application.