This is Claire's Mood Polish in Calm/Wild topped with China Glaze Crackle Glaze in Faultline, no topcoat. A lot of people didn't care for the Faultline formula, but once I got the hang of it, I liked it. You have to do a quick, somewhat thick coat over completely dry polish. Most crackle topcoats fare better with a thin coat, but not this one. Here are a couple closeups of the nails on which I used a thicker coat:
Thanks for reading!