fool’s gold
noun /ˌfuːlz ˈɡəʊld/
/ˌfuːlz ˈɡəʊld/
[uncountable]- a yellow mineral found in rock, which looks like gold but is not valuable, also called iron pyrites see also pyrites
- something that you think is valuable or will earn you a lot of money, but which has no chance of succeedingTopics Difficulty and failurec2