Wadi Suq pottery of the early second millennium B.C. in the Oman Peninsula is (1) completely different from the previous Umm an-Nar assemblage, (2) practically restricted to the Oman Peninsula, and (3) stylistically homogeneous from one area to another. This report is based on archaeometric studies of Wadi Suq pottery from the Oman Peninsula sites of Hili and Shimal. Objectives of the study were: (1) to reconstruct technology of Wadi Suq pottery; (2) to determine the petrographic environment of ceramic manufacture; (3) to test stylistic homogeneity versus provenance homogeneity; and (4) to detect possible inter-regional exchange. Analytical techniques used were low power microscopic examination followed by thin-section analysis of a smaller sample of specimens. The common shapes and forming techniques of fine Wadi Suq ware are described. The fine ware is rare at Shimal compared to Hili. The geology of the Oman Peninsula is diverse, and therefore presents favorable conditions for provenance determination. Low power examination suggested substantial heterogeneity in fabric at both sites, and this was confirmed by thin section examination. The thin section data also indicated a correspondence between ceramic fabric and the local geological environment at both sites, thus mitigating against an inference of exchange. Thus, technological and decorative techniques must have been shared among potters working in a number of places.