These are two coats of Zoya Raven, and then Missha BR102. It's easy: paint the base color, and then remove as much of the secondary color as you can. Brush on top of the dried base--the streakier, dirtier, more textured, the better. Do it until you are satisfied with each nail.
I put on topcoat to emphasize the shiny (and oh, how shiny it got!) but you don't have to put on top coat if you want to emphasize the gritty texture of the nail. I assumed that the grittier it felt, the less 'on-purpose' my nails would look. Didn't want that.
Anyway, I'm completely in love with this look. It reminds me of tortoiseshells and dirty jewelry and halloween. Oh, and stones. And it's so easy: I could walk out while the nail is still drying because it's not meant to LOOK polished. That's what's so cool about it.
I keep forgetting to swatch Zoya Raven for you guys. Soon, I promise. :)