Hi, to everyone. I have a question. I have ore, in which 88% iron, silver, copper, nickel, Rhodium, Iridium, palladium. etc. I wanted to remove iron and other metals, and take Rhodium, Iridium and palladium . I put ore in HCL, and than in some samples also mix Nitrac asid, it's colour became dark green, than after day or so it's become …