NARS has released a new nail polish for spring called Disco Inferno, a complex sheer sparkly metallic ($19). I've never found a nail polish so difficult to describe. It's almost duo-chrome, but not quite. On me it's an iridescent grey-purple-opal-blue infused with tiny silver micro sparkle flecks. Sometimes it flashes a hint of green, but on me it's mostly purple-blueish. It has a 90s-ish feel - reminiscent of edgy metallics from the early Urban Decay/Hard Candy days, and some older Chanels like Fluorine and Metal Argent. As most have reported, Disco Inferno is quite sheer. Even with three coats it still has a slight transparent finish where you can see the nail tips underneath. I think it's beautiful although I do feel that it is slightly too edgy to wear to a conservative work office.
Here it is swatched with three coats:
There's nothing quite like it in my current nail polish collection. The most similar color I own is OPI's Not Like the Movies (looks more similar on the nails than on the nail wheel or in the bottle). OPI's The World is Not Enough has a similar edgy feel with a transparent finish but is still quite different.
Nail wheels have four coats (all shades are sheerish):
Nail swatch comparisons have three coats:
Bottom line gorgeous and listed as limited-edition. Available online at Narscosmetics.com.