This particular icon has two vertical lines that are sitting parallel to each other. At the ends of both lines is a curved line that curves inwards towards the two vertical lines.
This is a Gemini 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 13,300 icons, all in the same style and quality.