The first one was described as 'huge tibet silver gallant ring'. I got it for $1.50 (on auction, free shipping). You can also get it in 'buy it now' section for $3.50.
I wanted to get a ring like this one in H&M store a couple of months ago, but it was €7.00. I did a right thing leaving it behind and searching for something similar on Ebay. This 'tibet silver simulated stone ring' cost me only $1.26 (on auction, free shipping).
I think I like the knot one a bit more than the stone one. Which one is your favorite?
Thanks for looking and commenting!