The Red Planet's reproduction of the G-Stone, exhibiting identical properties. Mass-produced by Abel, the Red Planet's leader. Used to power the Ark Armada and the cyborg Soldato Division. Using the Jewel Generator (apparently identical in function to the GS-Ride), the J-Jewel can be used as a power source just like the G-Stone. When a J-Jewel is active, a "J" symbol appears visible within the jewel. Similar to the activated G-Stone's "G" symbol. An Arma is able to shut down a J-Jewel at any time.