CM2: Buried Treasure
Official site for a remake of the game which adds 100 levels and a level editor. Features screenshots.
Electric Escape: Crystal Mines II
Review by Robert A. Jung. 7.5. "Crystal Mines II borrows a lot from earlier puzzle games, especially Boulder Dash and Chip's Challenge, and produces a decent challenge to both the mind and the reflexes."
The Atari Times: Crystal Mines II
By David Sherwin. 75%. "CM2 may not be a true sequel to Boulderdash, but it is its most worthy cousin, and one of the cornerstones of the Lynx?s puzzle library."