What is diamond in the rough?

"Diamond in the rough" is a popular idiom used to describe something or someone with exceptional potential or talent but lacking refinement or polish. The phrase suggests that the inherent value or qualities are not immediately apparent and require development or nurturing to be fully realized, much like a natural diamond that appears unremarkable in its rough form but, once cut and polished, reveals its true brilliance and worth.

This concept is often applied to people who exhibit raw potential or hidden talents that need to be cultivated. It can also refer to objects or opportunities that, with effort and transformation, could become much more valuable or impressive. The expression emphasizes the importance of recognizing potential beneath the surface and investing time and resources to bring it out.