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 Gemini icon has
Android KitKat style. If you use the icons for Android apps, we recommend using our latest Material Icons icon pack (please check our sidebar on the right). Otherwise, it's a solid icon pack that looks good in small resolutions, either on the web or in print. It's characterized by thick lines, smooth corners, and is optimized for 24x24 pixels.