The AK-47 | Aquamarine Revenge skin was added to CS:GO in the Operation Vanguard update on November 11, 2014 as part of the Cache Collection.
The Aquamarine Revenge skin features a blue and purple color scheme resembling an ocean theme. The top of the gun has purple tentacles wrapping around it with a menacing skull near the barrel.
The Aquamarine Revenge is a rare Covert grade skin making it highly desired and valuable. As one of the more popular AK-47 skins, it has retained good market value long after Operation Vanguard ended.