This Ruby Programming Language icon is made in Material Design style developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 4,400 icons, all in the same style and quality.
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.