This research was funded by the following projects: (ECODIGICOLOR), grant number TED2021‑132023B‑I00, supported MCIN/AEI /http://dx.doi.org/10.13039/501100011033 and Unión Europea NextGenerationEU/ PRTR (Proyectos estratégicos orientados a la transición ecológica y digital) and project “Aplicación avanzada de las algas procedentes de la Alhambra y el Generalife en técnicas artísticas y de conservación‑restauración, (FICOARTE2), grant number P18‑FR‑4477, supported by Consejería de Universidad, Investigacion e Innovación, Junta de Andalucía, Programa FEDER, “Andalucía se mueve con Europa”, Grant PID2020‑113022GB‑I00 funded by MCIN/AEI/10.13039/501100011033 and by “ERDF A way of making Europe”, by the “European Union”.The archaeological heritage at Cerrillo Blanco (Porcuna, Spain) is made up of 27 sculptural ensembles and hundreds of fragments dated between the seventh and second centuries BC. They represent a fundamental milestone in Iberian art and culture. Despite their relevance, no scientific studies have been carried out to date in order to fully understand the materials, intentions and techniques that led to their creation. This is a study carried out on original pieces from the Archaeological Museum of Jaen using stereoscopic optical microscopy (SOM), polarised optical microscopy (POM), X-ray diffraction analysis (XRD), Fourier-transform infrared spectroscopy (FTIR), field emission scanning electron microscopy with energy dispersive x-ray analysis (FESEM-EDX) and spectrophotometry (SF). The results obtained provide new information on the material composition of this important legacy of the Iberian civilization as well as its main alteration factors.MCIN/AEI TED2021-132023B-I00, PID2020-113022GB-I00Unión Europea NextGenerationEU/ PRTR TED2021-132023B-I00Junta de Andalucía, FEDER, "Andalucía se mueve con Europa" P18-FR-4477"ERDF A way of making Europe" Unión Europea PID2020-113022GB-I0
