rough diamond
B2Informal, Figurative
Definition
Meaning
A person who has admirable qualities or potential but lacks refinement or polished manners.
An uncut or unpolished gemstone; by extension, a person or thing of good quality or potential that appears crude or unrefined externally.
Linguistics
Semantic Notes
Primarily metaphorical in modern use. Implies an inherent contrast between valuable inner qualities and an unpolished, coarse, or unsophisticated exterior.
Dialectal Variation
British vs American Usage
Differences
Both variants use the term identically in meaning and form.
Connotations
Slightly more common in British English, often associated with a certain affectionate or admiring tone.
Frequency
Moderately low frequency in both; perhaps more prevalent in UK narrative and descriptive contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
He is a [rough diamond].She described him as a [rough diamond].He's what you might call a [rough diamond].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “a diamond in the rough”
Usage
Context Usage
Business
Rare; might describe a talented but socially unskilled employee or entrepreneur.
Academic
Very rare; not a technical term.
Everyday
Common in descriptive conversation about people's character.
Technical
Used literally in geology and gemology for an uncut diamond.
Examples
By Part of Speech
verb
British English
- N/A
American English
- N/A
adverb
British English
- N/A
American English
- N/A
adjective
British English
- N/A
American English
- N/A
Examples
By CEFR Level
- My uncle is a kind man, but he is a rough diamond.
- The new mechanic is a bit of a rough diamond, but he's brilliant with engines.
- Beneath his gruff exterior and lack of social graces, he's a real rough diamond with a heart of gold.
- The director was known for being a lovable rough diamond, whose blunt speech often masked his shrewd artistic vision.
Learning
Memory Aids
Mnemonic
Think of a real, dirty, uncut diamond found in a mine – it's valuable but not shiny yet. A person who is a 'rough diamond' is like that: valuable inside but not polished on the outside.
Conceptual Metaphor
PEOPLE ARE GEMS / CHARACTER IS A SURFACE (A valuable person is a gemstone; an unrefined character is a rough surface).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation resulting in 'грубый бриллиант' for a person; it sounds nonsensical. Use 'неотёсанный алмаз' (fig.) or 'золотой человек, но без манер'.
- Do not confuse with 'тёмная лошадка' (dark horse), which implies unknown potential, not lack of polish.
Common Mistakes
- Using it to describe an object that is simply old or broken. *'My car is a bit of a rough diamond.' (Incorrect unless the car has hidden, excellent qualities).
- Spelling as 'ruff diamond'.
- Using it pejoratively without the implied positive core.
Practice
Quiz
In which context is 'rough diamond' used correctly?
FAQ
Frequently Asked Questions
It is generally a compliment or a term of endearment, as it highlights valuable underlying qualities. However, it does acknowledge a lack of polish, so context and tone are important.
Its primary modern use is for people. The literal meaning (an uncut gemstone) is correct but less common in everyday language. Using it metaphorically for objects (e.g., a fixer-upper house) is possible but less idiomatic.
They are virtually synonymous. 'Rough diamond' is more common in British English, while 'diamond in the rough' is more common in American English. There is no significant difference in meaning.
Not necessarily. The term describes their current state. It suggests potential for refinement but does not guarantee it. The focus is on the inherent value despite the rough exterior.