fool's gold
C1Informal to semi-formal. More common in figurative, evaluative contexts than literal geological ones.
Definition
Meaning
The mineral iron pyrite (FeS₂), which has a metallic lustre and is pale brass-yellow in colour, often mistaken for real gold by inexperienced prospectors.
Anything that appears valuable, promising, or genuine but is, in fact, worthless, deceptive, or illusory.
Linguistics
Semantic Notes
The term strongly implies deception, either self-inflicted (due to naivety) or external. It carries a judgmental, often cautionary, connotation.
Dialectal Variation
British vs American Usage
Differences
No significant orthographic or usage differences. The term is equally understood and used in both varieties.
Connotations
Identical connotations of false promise and deception.
Frequency
Comparably frequent, though its literal use is tied to the historical context of gold rushes, which were prominent in US history.
Vocabulary
Collocations
Grammar
Valency Patterns
[Something/Someone] + be + fool's gold[Subject] + mistake/dismiss + [object] + as/for fool's gold[Subject] + chase/seek + fool's goldVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “All that glitters is not gold.”
Usage
Context Usage
Business
Used to describe a seemingly profitable investment or market trend that collapses.
Academic
Used in economics, history, or geology to describe false resources or failed theories.
Everyday
Used for relationships, job offers, or purchases that turn out badly.
Technical
Specifically refers to the mineral iron pyrite.
Examples
By Part of Speech
verb
British English
- They've been fool's-golding investors for years with those flashy brochures.
- Don't be fool's-golded by the initial hype.
American English
- He fool's-golded himself into thinking the scheme was legit.
- The company is accused of fool's-golding its customers.
adverb
British English
- The project failed fool's-gold quickly once funding dried up.
- His promises shone fool's-gold brightly but meant nothing.
American English
- The stock rose fool's-gold fast before the crash.
- It glittered fool's-gold, attracting the naive.
adjective
British English
- It was a fool's-gold promise from the start.
- He has a fool's-gold charm about him.
American English
- They made a fool's-gold investment in that startup.
- She saw through his fool's-gold personality.
Examples
By CEFR Level
- The shiny rock was not gold, it was fool's gold.
- The cheap watch looked expensive, but it was just fool's gold.
- The politician's promises of lower taxes proved to be fool's gold after the election.
- Many early internet ventures were dismissed as fool's gold by traditional investors, only to become wildly successful later.
Learning
Memory Aids
Mnemonic
Think of a 'fool' getting excited over shiny 'gold' that's just worthless rock. It's a perfect image for any flashy disappointment.
Conceptual Metaphor
APPEARANCE IS DECEPTIVE / FALSE VALUE IS WORTHLESS METAL
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation as "глупое золото." The established term is "железный колчедан" or "пирит" for the mineral. Figuratively, use "обманка", "мираж", or "ложная цель."
Common Mistakes
- Using 'fool gold' without the possessive 's'. Incorrect: 'It was just fool gold.' Correct: 'It was just fool's gold.'
Practice
Quiz
In which context is 'fool's gold' used LITERALLY?
FAQ
Frequently Asked Questions
Yes, it inherently describes something worthless disguised as something valuable, carrying a negative, cautionary connotation.
While the primary form is a noun, it is occasionally used informally as a verb (e.g., 'to fool's-gold someone'), meaning to deceive with a false promise of value.
'Fool's gold' implies a specific, often crude, deception that tricks the naive, stemming from a physical mistake. 'Faux' (French for false) is broader and often describes a deliberate, sophisticated imitation, like 'faux fur' or 'faux marble.'
A 'pump-and-dump' stock scheme, where a worthless asset is artificially inflated (pumped up) to look valuable before the creators sell (dump), leaving other investors with losses, is a classic example of financial fool's gold.