Gradual glitter nail art pictures 2015 style

Quick answer：

Gradual glitter nail art refers to a nail design that features a smooth transition of glitter from dark to light, creating a shimmering effect. The term '2015 style' suggests that this design was popular in 2015. Nail art styles can vary widely, with some focusing on simplicity and others on elaborate details. In the context of 2015, the trend favored bold and colorful designs, often incorporating various types of glitter and gemstones.