These dolomite crystals are from the Pomba Pit in Serra das Egus, Brumado, Bahia, Brazil. This mine is a commercial producer of magnesite and talc however outstanding examples of several accessory minerals including dolomite are found there. The mine owners enforce a ban on mineral collecting and that includes the miners employed by the mine. Dolomite is a carbonate and includes the elements Ca, Mg, C and O. This piece consists of a magnesite matrix that hosts hexagonal crystals with skeletal complex growth. It measures 1 13/16 x 1 1/16 x 1 inches or 46 x 26 x 25 mm.