That's "Sparks on Screen", it's an online exclusive. I'm not rushing out to get it. Looks a lot like a $5US Revlon polish, "Sparkling".
Yes, it looks like it might be dupable. I'll wait for more swatches.
Some more pics
MAC Permanent Nail Lacquers | Vampy Varnish
Midnight Tryst looks lovely in those swatches. Has anyone ordered anything from this collection?