Minerals of interest were found mostly in piles of mineralized sandstone blocks near the portals to the mine. This mineralized material has been exposed for years and soluble species have been dissolved and re-formed in cracks and on surface areas within the pile. You will need a typical assortment of tools that includes heavy sledges and bars to break up large blocks of sulphate-cemented sandstone. I recommend face masks and eye protection as dust from the pile is highly irritating and may contain radioactive species.