I here this crap from time to time in the jewelry world. "Blood diamonds", you don't want to buy a diamond because some kid in a third world shithole in Africa might have gotten an arm cut off with a panga that was bought with money that was made from selling that diamond.
If you worry about such things precious metals and jewelry aren't for you. Oh, and don't buy that fancy hardwood for your new bar or deck, that could have come from a third world shithole too. Truth is people have been looting, killing, raping and enslaving each other since the beginning of time. How they make money to do these things isn't important after the those people are long dead. Besides in today's world buying precious stones, metals, and exotic hardwoods from third world countries helps the people in those countries crawl out of the mud.
As for evil silver, isn't it all? I don't know how much silver is recycled today but it is a damned lot. About fifteen years ago around 65% of the gold used in jewelry was recycled and the price was much lower back then. Mints buy that silver too, some of the refineries run mints. So those shiny new coins you have may contain silver or gold from someone's jewelry. Maybe that person sold it to a pawn shop, maybe before they sold it to a pawn shop they cut some one's throat for it. Is the blood on your hands because someone else did evil?