Jewel of Atlantis

The Jewel of Atlantis is a crystal and a power source of the ancient city of Atlantis. First appearing in the DuckTales reboot television special Woo-oo!, it lit up when Gabby McStabberson's throwing knife activated one of Atlantis's traps. Scrooge, Donald, and Dewey removed the Jewel from the ceiling and brought it back to Duckburg.