underwater
adventure
ancient
antique
background
bottom
box
cartoon
chest
coin
crystal
deep
fantasy
game
gem
gemstone
goblet
gold
golden
hidden
illustration
jewel
jewellery
jewelry
loot
lost
metal
money
ocean
open
pirate
precious
rich
riches
ruby
sea
stone
sunk
treasure
treasury
trophy
trunk
water
wealth
wooden