The Crystal Men The Crystal Men are an alien race from the planet Mercury. They once traveled to Earth to destroy the Rock Men, because they had planned to destroy their home planet. Army The Crystal Men army uses spaceships with drill-noses capable of burrowing into the ground. Their enemies, the Rock Men also use a drill-nosed craft for their army. Known Crystal Men Crystal Men Captain Crystal Men Lieutenant Mercury nuclear core commander Mercury nuclear core soldiers Appearance The Superman/Aquaman Hour of Adventure Between Two Armies Retrieved from "https://superfriends.fandom.com/wiki/Crystal_Men?oldid=58967" Categories: Alien Races Species Filmation Community content is available under CC-BY-SA unless otherwise noted.