Darth Oberon's Lightsaber

History
Darth Oberon created his lightsaber shortly after striking everybody in his former village down in rage and formally becoming Darth Ceaenen’s apprentice.

Description
Darth Oberon modeled his lightsaber hilt after the pommel of his ryyk blade. Substantially larger than the average lightsaber, as to fit in his Wookiee hands, the weapon had a serrated crossguard

Crystals.
Red synthetic crystal

Nextor crystal

Sigil crystal