I know there are a lot of errors with this colorado coin but I can find little info on it. I posted this in crh as well. Drop test don't sound like silver or clad. Looks like silver but is a Denver mint. I'm a noob with weighing coins but here is what I got. My clad quarter weighs 0.005kg. My silver one weighs 0.007. And this odd thing 0.006. So any help would be great.