Greenish patina, great condition, 20mm, 1.8 grams, bronze. Original brown patina with some adhearing earth. Very attractive.We do not clean our rings - we sell them as they come from hoards and after washing them with warm water to remove the adhering dust. Although they might look nicer while shiny, rings with removed patina (as many sold on ebay) are arguably worthless, since it becomes impossible to authenticate it and prove its' age. Celtic ring money are my most favorite type of artifacts/coins (I bought my first ring when I was a high school kid:-), and we have a large inventory of authentic ring money. When you buy from us, the authenticity of the rings and your satisfaction are guaranteed :)Before the introduction of struck coinage in Celtic lands, Celtic ring money(gold, silver and bronze rings), celtic arrowhead and bell money wereused as currency in Celtic lands in Danube area, France, England and Ireland. Sometimes these rings took a pretty elaborate shape (such as"wheel money" in Gaul, star-shaped rings, interlinked rings etc.) andare very interesting collectible items, that can also be used aswonderful pendants or finger rings. An inexpensive way to touch the magical Celtic past. This particular ring was found in Hungary.