Idea of Ruby Programming Language Icon
The icon had a octagon shape at the center of it and is surrounded by various triangle shapes both upside down and right side up. Under the triangles at the very bottom are to upside down right angle triangles. Together they all form a gem-like shape.
This page shows the different variations of the Ruby Programming Language from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free.