Black Diamond was a crime lord who ran a diamond smuggling operation in Gotham City. He organized the escape of some notorious criminals from prison to help him on his mission to eliminate Batman. The fugitives couldn't kill the Caped Crusader and due to their lack of success, Black Diamond was captured and arrested.
- This version of Black Diamond (Earth-Two), including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 3 Appearances of Black Diamond (Earth-Two)
- 1 Images featuring Black Diamond (Earth-Two)
- Quotations by or about Black Diamond (Earth-Two)
- Character Gallery: Black Diamond (Earth-Two)