英文關鍵字
alaska
america
australia
burkina
california
canada
china
colorado
costly
dear
digger
diggers
faso
ghana
gilded
gold
golden
idaho
lode
luxe
material
metal
mexico
mine
miner
minerology
mining
nevada
nugget
peru
piece
pit
precious
pyrite
raw
repository
rock
rough
russia
source
states
stone
treasure
united
valuable
yellow