Final answer:
The phrase "Tiffany is a diamond in the rough" is a simile that compares Tiffany to a diamond with unfulfilled potential.
Step-by-step explanation:
The phrase "Tiffany is a diamond in the rough" is an example of a simile.
A simile is a figure of speech that compares two unlike things using the words "like" or "as". In this case, Tiffany is being compared to a diamond in the rough, which means that she has potential or worth that is not yet fully recognized or developed.
Other examples of similes include "as brave as a lion" or "crazy like a fox".
Learn more about simile