The major goal of this project was to develop a set of low-fired reference materials that reflected the range of ceramic composition found in the archaeological record. Production of reference materials relied on characterizing ceramics found in the James and Potomac River basins in order to determine their physical properties and composition. These ceramics were selected because their archaeological and historic use is specific to a relatively small geographic area. In addition, they utilized a number of different temper types, which were added to improve ceramic strength. Unfortunately, the physical and chemical characteristics of the ceramics used in this study varied too widely. Measurements for ceramic hardness, porosity, bulk density and composition were inconsistent. This made it difficult to actually produce low-fired reference materials reflecting the archaeological samples analyzed. For this study, inconsistencies in ceramic production materials and methods, as well as the overall degree of preservation all affected collected data. Despite this setback, VDHR was able to contribute to our knowledge of the composition of these ceramics associated with the James and Potomac River basins.