YSL Arty rings are back at Net-A-Porter.  I bought this one a few years ago and I'm still in love:

YSL Arty Flower Ring

I'd love to snag either of these too:

YSL Arty Turquoise Enamel Ring

YSL Arty Glass Ring

They're kind of a steal at $200, right?  Probably the only other thing you could buy from YSL for $200 is like a pair of socks or something.