Grain-size parameters and mineralogy of 30 sand samples from Farewell Spit have been studied. The foreshore, backshore, and dune environments have distinctive means, sorting, skewness, percentages of heavy minerals, and distribution of selected mineral species. Grain-size parameters and mineralogy indicate that sand is eroded from the north side of the spit and carried southwards by the wind. Mineral distribution may reflect the importance of grain shape during the erosion of sand by wind.