See the lovely sparkly flecky thing going on in there? I love this color, too. It's a nice tealy kind of blue, but you wouldn't ever call it teal.
Last one. I love how the light hits it and it looks like water. I didn't do anything to this pic, that's just how it looks. Such incredible shine. I don't think a top coat would hurt this that much. As it's just a swatch this has no top coat on it, but...it might dull the sparkle some. A thick top coat may tone this down a little but I don't think it would hurt it. It's too alive and happy. I love this.