Simple warm pH-imbalanced water is all you need. I can make cerrusite artificially with older lead-plumbed copper pipe and a moderate temperature (50C) pH-imbal

Simple warm pH-imbalanced water is all you need. I can make cerrusite artificially with older lead-plumbed copper pipe and a moderate temperature (50C) pH-imbalanced hard water source, run that whole discharge through a water carbonation system and let the results evaporate under pressure. Bam. In a day I've leached lead out and crystallized it into another form that you would find in volcanic fields. Note: The leaching takes almost no time, the evaporation is the majority of time needed for forming the cerrusite. Lead is nowhere near as inert as you imagine it to be. It oxidizes readily.