Final answer:
The fraternity symbol you are referring to is the crest of the Pi Kappa Phi fraternity.
Step-by-step explanation:
The fraternity symbol you are referring to is the crest of the Pi Kappa Phi fraternity. The crest is shaped like a diamond and includes the letters 'Pi Kappa Phi' inscribed on a ribbon in the middle. There is a star above the ribbon and a lamp below the ribbon.