During the colonial period and after emancipation, from the 17th century to today, pottery was made by Africans in the Caribbean for their own use. This material is surprisingly uniform in the shapes of vessels for various reasons and in the nature of fabrics due to the volcanic geology of most islands. This presentation will focus on the latter topic specifically, demonstrating the challenges of identification of inclusions from vessels recovered from several excavations on two neighbouring islands in the Lesser Antilles: Nevis and St. Kitts. Nevis is predominantly dacite and St. Kitts predominantly andesite. Documentary records indicate that the potters of Nevis made pottery for more than their own use, trading their wares to neighbouring islands for sale in the Sunday markets run by slaves. Current research is being conducted to determine whether any of the wares found in the St. Kitts assemblages derived from Nevis.