Thurakzima 7
From Tardis Wiki, the free Doctor Who reference
Thurakzima 7 was a planet visited by Eighth Doctor. He took Sam Jones to an opera performed by the native silicon-based life-forms. (PROSE: The Janus Conjunction) The Tenth Doctor later mentioned the Living Stones of Thurakzima 7 as silicon-based life forms who put the "rock" into rock and roll. (COMIC: Signs of Life)
