Frick

Frick was a nearly indestructible type of metal. It was generally considered rude to speak about frick by name in public, particularly around children. Grand Master Yoda personally banned mentioning frick from the Chair Emporium and all other Jedi-owned locations. Despite this, he would often mention frick in front of the younglings when no one else was around, knowing that they wouldn't dare tell on him. Inevitably, some of the younglings would later mention frick, which Yoda would blame on another Jedi, usually Mace Windu who was known for his frequent use of foul language.

Sheev Palpatine constructed his lightsabers out of frick. Electrostaffs were also made from frick.