This is Amethyst Chrome. It's a pinkish purple metallic polish.
Opal Chrome is a lighter shade of pink than Amethyst Chrome.
Topaz Chrome is a beautiful golden shade.
Since these are chrome finish polishes, they can easily streak and cause brush lines in your manicure. My favorite thing to do with these polishes is to wear them with black shatter, which really brings out the chrome polishes. I also like to use them for stamping.