hidden gem

Noun

 * 1) Something possessing a value or beauty that is not immediately apparent, which therefore has received far less recognition than it deserves.
 * 2)  A hidden item for a player to find.
 * You get a bonus in this game if you find the five hidden gems.
 * 1)  A hidden item for a player to find.
 * You get a bonus in this game if you find the five hidden gems.

Translations

 * Catalan: joia amagada
 * Cebuano: tinagoang hiyas
 * French: joyau caché
 * German: verborgene Juwel
 * Portuguese: joia escondida
 * Spanish: gema escondida, gema oculta
 * Swedish: dold pärla
 * Tagalog: tagong hiyas