diamond in the rough

Cultural  

1. Someone or something with potential or talent but lacking training or polish: “Her singing voice is beautiful, but she needs help with her gestures; she's a diamond in the rough.” This phrase refers to the fact that diamonds found in nature are rough and uneven. They must be cut and polished to bring out their true beauty.

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diamond in the rough Idioms  

1. Also, a rough diamond. A person of exceptional character or potential but lacking polish and refinement. For example, Jack is intelligent and trustworthy but lacks manners—he's a diamond in the rough. [Early 1600s]

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Example Sentences

Investors always like to find a diamond in the rough.

From Barron's • Dec. 1, 2025

Wild Mother had also turned to social media to find her tribe - having been called "a weirdo, an alien, a diamond in the rough" offline - and has built a following of thousands.

From BBC • Sep. 22, 2024

“It was portrayed as she found this diamond in the rough that nobody ever heard of,” said French.

From Los Angeles Times • Sep. 10, 2024

“I think there’s a lot of people on the sidelines thinking, ‘This is a diamond in the rough if you do it right.’

From Seattle Times • Mar. 9, 2024

Most of my siblings regard me as being spoiled and a troublemaker, but Pa says I am really a diamond in the rough.

From "First They Killed My Father: A Daughter of Cambodia Remembers" by Loung Ung