Copper is VERY toxic, not only to mamalian life but also to aquatic life.
Over "trace" amounts in the body it will make you sick as a dog (you'll wish you'd have died).
Just look up copper toxicity on the web and all the fun you get to have for doing that to yourself.
Even breathing in black copper oxide dust can do this to you. I had a friend who accidentally did this to himself. He was sanding something to remove a black coating from it and didn't realize it was black copper oxide - oops. And then the idiot was doing it in a closed garage and wasn't wearing a respirator! Oh yeah he learned his lesson - ouch.
When I sent him the link to what a copper overdose in the body does, he emailed back that yep, had EVERY one of those symptoms. He was sick as a dog for 4-5 days. OUCH!
Glad to hear you listened to Kephra before you did something you'd live to regret.