Free images results:
 

Treasure pictures, stock photos and images

 
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Coins Royalty Free Stock Images
Author: Chelnok
Starfish Stock Photos
Author: Sax
Loot Stock Photos
Author: Webking
Amber beads Royalty Free Stock Photography
Author: Lvnel
Number 1 Stock Photo
Author: Clarita
Plugs Royalty Free Stock Photo
Author: Tuulum
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Treasure map Royalty Free Stock Photo
Author: Frui