This is called Purple Jewel and I do regret not having applied over purple, to see how it would come out.
I applied over black and this polish is laden with flakes, really saturated. With two coats, I barely had any space without flakes on my nails.
The colour shifting is amazing, from green to yellow, orange and fiery red. Really pretty.
Still, I really like it, as I mentioned before, it is way more saturated in flakes that the two mentioned above and I think three coats would probably cover the whole nail, creating an almost metal effect. Maybe next time….
Durability was good, but it shrunk an awful lot when I applied the topcoat!