Silverback Gorilla, also known as "Silver Gorilla," is an indica marijuana strain made from a cross between Grape Ape and Super Silver Haze. For the first time, Dian Fossey isn’t the only person able to enjoy life with the gorillas. For those struggling with insomnia and stress, Silverback Gorilla is a must-try strain. While typically gentle and relaxed, this indica can pack a punch.