I never thought of this but this would work and the glitter wouldn't chip easily like it does as a top coat. A coat of glitter in between two layers of color = marble effect - never thought of this, must try!
tie dye nail polish You put water in a bowl and drop random colors of nailpolish in it. then you stir it with a toothpick and put petroleum jelly on your fingers, so that the nail polish only gets on your nails. then you stick your fingers in the bowl.
20 Nail Hacks, Tips and Tricks Every Girl Needs To Know Now