Does Luke Use Qui Gon's Crystal?

As Luke found the final components for his lightsaber in the home of Obi-Wan Kenobi, it's possible he used the crystal that once belonged to Qui-Gon Jinn.

What Crystal did Luke use?

Others who possessed lightsabers collected them as a trophies from fallen Jedi. Due to this, Luke was forced to fabricate his own green synthetic lightsaber crystal, utilizing a small blast furnace and a book of instructions found within the home of his fallen Master on Tatooine.

Why didn't Luke have a blue lightsaber?

Anakin Skywalker carried this blue-bladed Jedi weapon throughout the Clone Wars. After dueling his former apprentice on Mustafar, Obi-Wan Kenobi took Anakin's lightsaber and kept it on Tatooine for nearly two decades. He gave it to Luke Skywalker, who lost it when Darth Vader struck off his son's hand in Cloud City.