We report on an interdisciplinary approach to the study of early pottery finds from the Poma Archaeological Reserve, North Coast of Peru. The material is from a Formative kiln site at Batán Grande (1000–800 BC) and a ceramics workshop at Huaca Sialupe pertaining to the Middle Sicán period (900–1100 AD). Mössbauer spectroscopy, neutron activation analysis, optical thin-section microscopy and X-ray diffraction were used to characterize the material. Numerous sherds of Sicán black- and redware, bricks, moulds and kiln linings were studied. Local clay from the kiln site at Batán Grande, lumps of clay, and unfired sherds from Huaca Sialupe were used as model material for firing experiments under controlled conditions. By comparing the Mössbauer spectra from laboratory and field firings with the ancient materials, methods of early pottery making can be assessed.