These colors are pretty much both to die for. Both are dark green with some form of green sparkles or glitter. In the case of Emerald Sparkle it has larger, more dense glitter, and the base color is more opaque then LV. Las Vegas has small sparkles that are much more subtle, but still very eye catching, and has a jelly base. I prefer Las Vegas a bit more but you can't go wrong either way.
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index & ring: Emerald Sparkle, middle & pinky: Las Vegas