"People always thought Ozzy was a feral wild man, but he had a heart of pure gold," he wrote of Osbourne, who died last week at age 76

Geezer Butler of Black Sabbath didn't just lose a bandmate with the death of Ozzy Osbourne - he also lost a friend.

"I didn’t realize then that I would never see Ozzy again after that night," Butler writes of the July 5 "Back to the Beginning" show in England.