Rainbow Gem

s are a premium currency. The fastest and most consistent way to obtain Rainbow Gems is to complete Dungeons, making sure to open each chest.
==How to Gain==
* Dungeon chests
* Excavations
* Patrol rewards
* Seashell Store
* Events
==How to Spend==
===Required===
* Upgrades from Research Lab
* Maps from lighthouse
* Purchase Trade Port ships
===Suggested===
* Monument upgrades
* Tool upgrades after a certain level
===Optional===
* Instantly gain resources for Quests and the Trade Port
* Speed up timers
==Monument Upgrades==