Midnight Coil Ring: $11.99 at ModCloth
(worn with mixed metal stacking rings by House of Harlow 1960)
This purchase was inspired by Kristina of Pretty Shiny Sparkly, who wore hers with a number of other rings, including a dragon ring (also from ModCloth), in her recent Circle Circle Dot Dot post. I'd personally like to find a lion ring to pair with mine, though. You know, so I can be a huge nerd and use my jewelry to simultaneously represent both Slytherin and Gryffindor.