Bombshell Genius

Coleman Trebor when he last used his lightsaber
Image source: Attack of the Clones
Intent: To provide a lightsaber for Jessica found in a training session around the old Petranaki Arena
Development Thread: Stalgasin Memorial Stadium (22 posts)
Manufacturer: Coleman Trebor
Model: N/A
Affiliation: Jessica Med-Beq
Modularity: No
Production: Unique
Material: Rubberized durasteel, lightsaber components
Classification: Lightsaber
Size: One-handed
Length: Hilt: 37 cm, blade: 146 cm
Weight: 1.4 kg
Special Features:
- 2 green kyber crystals
- Bifurcating cyclical ignition pulse (allows the lightsaber to operate underwater)
Strengths:
- Can operate underwater
- Can cut through most materials
Weaknesses:
- Does not provide any enhancement to the Force skills of its user
- Does not deflect slugthrowers
- Will be resisted by standard lightsaber-resistant materials
Description: Its original maker and owner, Coleman Trebor, was a contemporary of Anakin Skywalker and Obi-Wan Kenobi on Geonosis. He was a member of the ground Geonosis Strike Team dispatched to extract Obi-Wan Kenobi, Anakin Skywalker and Padmé. As he attempted to engage Count Dooku in his box, Jango Fett instead fought him, killing Coleman. When Coleman fell to his death, his lightsaber remained hidden in the sand, since the damage inflicted by the Republic to the arena was extensive and cleaning up the stadium was a rather low-priority task for the centuries that followed and Geonosians, being almost entirely unable to use the Force, had no use for a lightsaber and hence left it there to withstand the damage of time.
Jessica came to Geonosis to undertake her initial Force-training and, after a while, detected the presence of an ancient lightsaber, belonging to a former Jedi Councillor. She inspected and cleaned the lightsaber, revealing that the lightsaber was filthy with sand and all of its components accumulated dirt over the centuries, but she found it otherwise rather "vanilla" compared to the other lightsabers she knew about: nothing that enhanced her power or her skills could be found in it. Nevertheless, like many lightsabers from that era and later, it had a bifurcating cyclical ignition pulse to allow underwater operation, especially considering that its original owner was from an aquatic species.
Primary Source: Coleman Trebor (he does not have any lightsaber-specific page on Wook)
*This is a canon item*