I don't wear a lot of green polish, but I do own quite a few. This one is definitely a gem to me. The name even fits that perception perfectly ;) Also, I heard that Pantone declared emerald the color of the year 2013.
I can't quite remember how many coats this was, but there is top coat. I'm thinking three, I believe I struggled a bit with the brush - it's hard for me to work with small brushes and tiny handles. But the outcome makes up for the struggle! I love the shimmer and wish it were more visible in the picture. It's gorgeous! "Emerald" actually reminds me of Illamasqua's "Viridian". Maybe those two will go up against each other in a Clash of the Polishes at a later point.
What's your favorite green polish?