This is 1 coat of BFF Tanzanite Dazzle over black.
Tanzanite Dazzle is a pinkish purple glitter polish with holographic glitter. I think I really need to go back to the beauty supply and grab the rest of these Dazzle polishes. I adore every single one I have.
Price: I think I paid $2.50
Availability: Bought at a local beauty supply but I've seen these floating around on Amazon, eBay, and random Beauty Supply websites