Meaning offool's goldin English

Noun

1. iron pyrite mistaken for gold; deceptive value
   The prospector discovered a vein of fool's gold in the mountain.
2. something worthless with deceptive value
   Many investors lost money on fool's gold investments with no real returns.
3. an unfulfilling experience with promising appearance
   The new restaurant looked promising, but the food was a fool's gold experience.
4. a mineral resembling gold but lacking value
   Iron pyrite, also known as fool's gold, has a shiny appearance but little value.