On the island of Inagua in the West Indies large quantities of salt (NaCl) are produced by the evaporation of sea water. Samples of the precipitates taken at various stages in the evaporation process do not contain the mineral dolomite in discernable quantities. Clear, pale-pink dolomite rhombohedra up to 0.14 mm. long are present in the sludge dump waste dredged from the evaporation pans less than 8 years ago. The rhombohedra are dispersed between crystals of other substances but give no clue as to their specific origin.