fool's gold

Etymology
From the idea that the mineral fools people (especially those who are fools) into mistakenly thinking that they have found gold. Regarding minerals that were named for deceptive appearance that prompts confusion with others, compare also apatite.

Noun

 * 1) A mineral or other substance often mistaken for gold; mainly iron pyrite.
 * 2)  Something worthless that deceptively seems valuable.

Translations

 * Albanian:
 * Arabic:
 * Armenian:
 * Basque:
 * Catalan: or dels ximples
 * Chinese:
 * Mandarin: 愚人金, 假黃金
 * Czech: kočičí zlato
 * Danish: narreguld
 * Dutch: gekkengoud,, ijzerkies, , het goud der dwazen
 * Esperanto:
 * Finnish: ,
 * French:
 * Georgian:
 * German:, Narrengold
 * Greek:, χαλκοπυρίτης
 * Hebrew:
 * Hungarian: bolondok aranya
 * Icelandic: glópagull
 * Italian: oro di Bologna, similoro, oro degli stolti
 * Japanese: 愚か者の金,
 * Khmer:
 * Korean: 바보의 금
 * Mongolian:
 * Norwegian:
 * Bokmål: svovelkis, pyritt, narregull
 * Nynorsk: svovelkis, pyritt
 * Portuguese: ouro dos tolos
 * Spanish: oro de los tontos, oro de los pobres
 * Swedish: kattguld, svavelkis, pyrit
 * Thai: ทองคนโง่
 * Turkish:
 * Vietnamese:
 * West Frisian: klettergoud