Opal Diamond Silver Ring (size 6)

Opal and Silver Ring Possibly a size 6. I’m a size 7 and it was tight I was told it’s opal and alpaca silver, but I don’t know much about opal or alpaca silver, so I’m not sure if it is It hasn’t rust since I’ve had it, but I also haven’t been able to wear it lol. I’ve had it for a year Quick shipping and accepting offers :)