This one is super cute and super easy! It's just layers of polish placed strategically.
Step one: Paint all nails with silver polish
Step two: Starting at the base of the nail, paint about half-way up with black
Step three: Paint entire nail with small glitter polish
Step four: repeat with small glitter polish, but begin about 1/4 of the way up the nail
Step five: switch to chunkier glitter polish and apply where the black polish meets the silver
Step six: Add one more layer of the chunky glitter polish from 3/4 of the way up the nail.