The Gem Sloop is a small boat with three light blue facet-shaped sails, a dark blue mast, and a dark blue body.
The Gems use this boat to travel to a living island, leaving Steven alone with his cat fingers problem.
- A "sloop" is a boat with only one mast (the pole that holds the sail) and a fore-and-aft rig (a sailing rig that is set along the keel line rather than perpendicular to it.) **The keel is a longitudinal structure under the boat that keeps the boat stabilized.
- A smaller version of it can be seen in the online game, "Heap of Trouble."
- It's seemingly slow.