Do you want to compare Amethyst with Cosmic Boy? Discover the powers, weakness & weapons of Amethyst and Cosmic Boy from Amethyst Biography and Cosmic Boy Biography. Find out all about Amethyst and Cosmic Boy.# Check out how is Amethyst unique and distinct from Cosmic Boy. Discover their love interest, sidekicks, family tree and the movies and games list in which Amethyst and Cosmic Boy have appeared. Find out everything about them here!