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.
This is the Octahedron icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.