Glitter is an easy way to add a gradient to a manicure. The translucent nature of most glitters allow the base color to peek through and blend. Some of the full coverage glitters do not work in this manner but the two to three coat polishes seem to add sparkle without overwhelming,
The base color here is China Glaze Bizarre Blurple and the Glitter is Milani Twinkle. The camera doesn't do the blues and purples in this glitter justice.