Ore arrived from high on the ridge, then:
1) Crushed to marble‑sized chunks, with the best pieces hand‑picked and sent straight to the rail chute.
2) Screened in rolling sieves; coarse pieces were re‑crushed until it was all sandy gravel.
3) Mixed with water and run over gently bouncing, sloped tables where heavy copper minerals separated from lighter limestone waste.
4) Remaining material went to chemical leaching and froth flotation to squeeze out more copper; the concentrate settled and was sacked for shipment.