Is there enough purples in the world? No, I don't think so. :D
This is Revlon Tanzanite from the Chroma Chameleon collection. This is a duochrome polish that transitions from purple to gold. Surprisingly, what I really liked about it was actually how purple it was, especially since the colour is a little dull in the bottle.
But the duochrome is too bad either:
The purple to gold duochrome isn't very flashy, but the hint of gold against the rich purple is definitely noticeable at angles.