Well I really f'ed things up this time with my gf. I bought a ring over the internet. It looked great, no problems, recieved just fine. However my gf wore it to bed and the next day she had a dark band underneath her ring. Like it stained her finger. She is so pissed and is accusing me of buying her a cheap ring. Not to mention I got a double wammy because I bought it over the internet and that screams "no effort". Anyway, the ring was advertised as Sterling Silver. I read that some staining might occur because of the small copper content. However she has a few other rings I have given her and they are all fine, but I'm not sure what they are made of. So these are my questions.
1. Did I just buy a cheap ring?
2. If not, did the online store rip me off?
3. If no and no, is it just common to get stains?