The success of "Nevermind" surprised the music industry. "Nevermind" not only popularized grunge, but also established "the cultural and commercial viability of alternative rock in general." Michael Azerrad asserted that "Nevermind" symbolized "a sea-change in rock music" in which the glam metal that had dominated rock music at that time fell out of favor in the face of music that was perceived as authentic and culturally relevant. Grunge made it possible for genres thought to be of a niche audience, no matter how radical, to prove their marketability and be co-opted by the mainstream, cementing the formation of an individualist, fragmented culture. Other grunge bands subsequently replicated Nirvana's success. Pearl Jam, which featured former Mother Love Bone members Jeff Ament and Stone Gossard, had released its debut album "Ten" in August 1991, a month before "Nevermind", but album sales only picked up the following year. By the second half of 1992 "Ten" had become a breakthrough success, being certified gold and reaching number two on the "Billboard" charts. "Ten" by Pearl Jam was certified 13x platinum by the RIAA.