There are two ways to achieve this glitter gradient - Method 1, laborious and kind of annoying. Method 2 is easy and quick but not sure if you are ready for the hack!
Method 1: Go with a really thin polish and do a few layers (picture shows three layers with a very fine glitter polish over a clear base coat) and then let it dry completely between each layer. In a weird way it can be soothing to go slow.
Methods 2: Using Nail Wraps,
Incoco makes really good glitter gradient nail wraps that are cheap and easy to get (search online as we don't currently stock them - Espionage cosmetics online has awesome nerdy ones) and they are really easy and last a long time.
For Nail biters they taste really terrible and it can keep you from biting your nails. Perfect glitter gradient with almost no work
Our BIGGEST tip is Seche Vite Top coat coat. It dries extremely fast and hard and keeps glitter (even big, thick glitter) really secure. We love them