Brand of the crusher please! I think you may be on the right track...? OK, You are a new channel so benefit of the doubt...... Please let me know if you intend to recover any precious mental from your pulverised material. Just grinding it up doesn't really tell us much. It would be interesting to see things like weight of all components at the begining also from how many boards, weight of the powder, both the fine powder and the courser stuff. Process these two seperately and see ahat yield you get of Au & Ag from each.
