Metal implements and possible metal slags were among some of the numerous artefacts associated with the Napa Site of Catanauan, Quezon, Philippines (2000 BP). Typically, metal slags are by-products of smelting and smithing, indicating that the people utilizing the burial site were engaged in metalworking. However, little to no evidence of metalworking (e.g., furnaces, smelting/smithing tools, etc.) has been found throughout the site. The presence of possible slags in the burial context could indicate a culturally-embedded role for these materials. This preliminary study aims to understand the context of slags and metals in the burial practice of Napa Site. Because slags may carry information on the reconstruction of ancient metallurgical processes, we look into what processes would produce these materials; and, if they are indicative of metalwork, and what type of metalworking activities were being conducted throughout the landscape of this burial site. To confirm the initial identification based on observable surface features, samples were analysed on a microscopic and molecular level. Macrophotography and Optical Microscopy (OM) were utilised to better visualise the heterogeneous features on the slags and condition of the metal implements. The microstructures of the slags observed contained glassy interiors, remains of an added flux, and iron oxides; while the metals show layers of corrosion and sand. Thirty slag and fifteen metal samples were then analysed using X-Ray Fluorescence (XRF) to identify the elemental composition of the materials to aid in the characterisation of the metal production process. We attempt to provide new insights on past metalworking activity, and contextualise this within the burial rituals in Napa Site, Catanauan. Further studies, such as mineralogical analysis, on metals are suggested to expand our understanding on their role in the rituals associated with the burial practices conducted in Catanauan during this period.