Black Diamond Holdings, LLCLogo Design Contest Logo Design Contest Contests / Black Diamond Holdings, LLC Black Diamond Holdings, LLC has selected their winning logo design. For $375 they received 151 designs from 34 different designers from around the world. Find out how LogoTournament works How LogoTournament works Contest Entries by gorist Return to Contest Return to Contest Withdrawn Prefers others. #17 Withdrawn Prefers others. #13 Withdrawn Prefers others. #1 Discussion No comments yet.