Why are some old coins completely green? Especially some of the Greek coins I have seen online. Also, some of the 1800 coins I have ordered have a little green on them. Should I leave it alone or is there something I can safely use to take it off without "cleaning" it. Does that make sense?
It is usually Patina, it protects the coin from corrosion so you don't want to clean it off. It is a good thing. It occurs naturally, so the coin would be problem free. stainless
Well, this one isn't too green, maybe more blue? And you can kind of see the green on this coin - http://www.auctiva.com/hostedimages/showimage.aspx?gid=72611&ppid=1122ℑ=180920354&images=180920354,180920366&formats=0,0&format=0
On both or one in particular...and is there anything you can do, probably more for the coin that I linked to. What are the chances it would spread if sealed and put in an album?
