This is one of my favourite looks that I've done in a long time! It looks complicated, but it's really quite simple - just multiple layers.
I've started off with a layer of H&M The Real Teal. Then I've used some plastic wrap to dab on Essie Incognito, which makes a really great texture. I've then used H&M Silver Fern to stamp a design from Born Pretty BPL-024 stamping plate. Final step was topping of with a few rhinestones (bought from eBay), and sealing it all in with INM Out The Door Super Fast Drying Top Coat.