"Holy moly, it's Chromastone!" - Chromastone in A New Dawn
Chromastone is a Crystalsapien from the planet Petropia. He first appeared in the Ben 10: Alien Force episode All That Glitters where fought against some energy-drained high school girls. Chromastone was destroyed in Vengeance of Vilgax: Part 2 and reformed into Diamondhead, however he was re-unlocked in the Ben 10: Ultimate Alien episode Fame where he was defeated by Bivalvan.
Chromastone briefly appeared in the Ben 10: Omniverse episode Trouble Helix where he was a test subject for Blukic and Driba's new weapon. He didn't appear again until the final episode of Ben 10: Omniverse, A New Dawn, where he tried to retrieve the Anihilaarg. He later briefly appeared while Ben was cycling through almost all of his aliens. Chromastone was voiced by Dee Bradley Baker in Alien Force and Ultimate Alien. Eric Bauza voices Chromastone in Omnivese.