This is an all-Revlon mani: my base color is Provence (which you can just barely see peeking through in some spots) and I did the marble in Enrapture, Impulsive and Blue Slate. The one thing I would do differently next time is to use a lighter color along with the darker ones to get more of a contrast. But on the whole I'm kind of amazed I pulled this off!
Oh and we're now done with the second chunk of prompts for the challenge, so I made another collage! Only eleven more to go!!
Now go admire all of today's other water marble manis!