Gungan-Inspired Lightsaber, with various components taken from existing Gungan design.
Glass Bulb - Taken from the Underwater City architecture
Spiral & Engraved Pattern Work - Taken from the tail of the Gungan submarine featured in Episode I
Leather Handle - Inspired by the materials used in Gungan clothing
Bronze Spikes - Modelled from Gungan weaponry.
More subtly, I've also added a pearl button, which has some simple modelling from the submarine too.