It's a logo of Roulette reduced to an image of a roulette circle. The roulette is a spinning circle with several square spots in which you bet your marble will land in, if not the house will win.
This is a Roulette icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,900 icons, all in the same style and quality.