Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Beautiful ring leaves nasty "ring"

I bought this ring because I thought it was beautiful. Turns out, it turns my finger green and I cannot wear it. I wore it a total of a few days before I saw the green appearing and it made me very angry. I knew it wasn't white gold when I ordered it, but I thought that only bubble gum machine rings turned fingers green... I guess not.