I showed this polish (from Lucky 13) in the summer sunlight a couple of days ago, and it was kind of blinding, so I said I would try again with a picture not taken in the bright Texas summer light. (We had a cool spring by our standards, but we're in full-on summer mode now.)
Here's the sunlight one, again - you can see that it's got much more of a shiny-metallic look to it, here, and it's harder to see the other colors in the mix.
Aurora Borealis was a limited edition polish and thus probably not something you can get your hands on easily. But there are so many of these flakies around now that you can probably find something similar.