I recently scored Camouflage Colour Black in a Lust Have It! sample box - at first I was disappointed, since it's just a plain black, but then I swatched it and discovered that it was extremely sheer. Hurray! Jelly sandwich!
I started with a couple of layers of Black, then dabbed OPI Polka.com, a pink/blue/purple glitter (see my original swatches of it here), and finished with an extra layer of Black.
The result reminded me of some of the indies in jelly bases floating around - I'm in love! It's made me want to collect jellies in all the colours (so 2012, I know).