During the refining of lead, a critical challenge is managing impurities, particularly the presence of precious metals. These metals are typically recovered through the Parkes process and the cupellation stage of refining. While cupellation has been practiced for millennia, the distribution of precious metals during this pivotal step remains underexplored. This project aims to investigate the distribution of precious metals—primarily silver, gold, and platinum group metals (PGMs)—between the litharge slag and the silver dore produced during pyrometallurgical lead refining. The study holds increasing significance as advancements in cupellation methods enhance efficiency and as alternative feedstocks, such as e-waste, become more prominent in secondary lead production.