"Return of Crystal Karma" (often abbreviated to R.O.C.K.) is a studio album by former Deep Purple, Black Sabbath and Trapeze vocalist/ bassist Glenn Hughes, originally released in 2000. It is Hughes‘s seventh solo studio album, his sixth since 1992. The album has a similar bass driven funk sound to 1999’s The Way It Is, although R.O.C.K. has a slightly more serious tone.