Glitter Gal Black Holographic
This is a very holo holo >.< and a good black, not dark grey. The formula is great, needs 2 thin coats, not far from opaque in one coat, just needs to be evened out. The only down side is the bottles are 9mls, but for me I don't remember ever using up a full bottle of anything. I will definately wear this again :) I love it, it's cosmic looking. You can buy this and others from http://www.glittergal.com.au/
Color Club Revvvolution
Not as holographic and a lot lighter, and the formula needed 2 - 3 coats. Revvvolution still is an awesome polish but I much prefer the Glitter Gal. In the shade Revvvolution is a charcoal grey colour, and Glitter Gal Black is black, so for me I would rather have black :)