The sticker was created by CS:GO community designers “b3d” and “CptnKraken“.
In the workshop submission the artists stated that Blue Gems are such an important part of CS:GO’s heritage, therefore their goal was not only to celebrate the beauty of blue gem weapon and knives, but they designed a perfect sticker to be applied to blue gem skins (or to “make any craft look like a gem”).
The sticker is gorgeous even when scratched, when it would reveal a hidden “661” to represent the notorious AK-47 “Scar Pattern”. As an additional detail, the artists were also able to incorporate the official “Case Hardened” pattern template as a texture to the surface of the gem.