Jade gems

Jade gems are normal gems, purchased by markets at Olive Island (on Cerulean and Meridian) and Greenwich Island (on Emerald).

Historical notes
Jades were used in The Race to Save Christmas, celebrated on in December, 2004. In this event, a Grinch's ship was loaded with good supplies 'stolen' from Hephaestus' Forge. The participants could keep whatever they managed to pillage from the ship, and there was a special prize for returning the jade gems. No market buys jade gems, and they will disappear from a ship's hold like any other.