The icon is a picture for the logo Octahedron. The icon is a picture of what looks to be an 8 sided die. The die is in the shape of an 8 sided diamond. The die has the number eight visible on the front of it.
Related to Octahedron Icon
Related icons are the icons with matching tags, as well as all gaming icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors