diamond in the rough

US /ˈdaɪ.mənd ɪn ðə rʌf/
UK /ˈdaɪ.mənd ɪn ðə rʌf/
"diamond in the rough" picture
1.

원석, 숨겨진 재능

a person or thing that has great potential but is not yet refined or polished

:
The young artist was a true diamond in the rough, needing only guidance to shine.
그 젊은 예술가는 진정한 원석이었고, 빛나기 위해서는 지도가 필요했다.
The old house was a diamond in the rough, with good bones but in need of renovation.
그 오래된 집은 뼈대는 좋지만 개조가 필요한 원석이었다.