The icon is the shape of a full circle. The inside of the full circle is covered with a large amount of dots that cover the entire shape. Each dot is spaced evenly through out the circle.
This New Moon icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,000 icons, all in the same style and quality.