Along with Idle Cash and Super Cash there are seven types of cash used to complete different tasks and purchase Skills within the Idle Miner Tycoon world!

Cash: The money you earn on the first continent (Grass Continent)
Ice Cash: The money you earn on the second island (Ice Continent)
Fire Cash: The money you earn on the third continent (Fire Continent)
Dawn Cash: The money you earn on the fourth continent (Dawn Continent)
Dusk Cash: The money you earn on the fifth continent (Dusk Continent)
Ancient Cash: The money you earn on the sixth continent (Ancient Continent)
Lost Desert Cash: The money you earn on the seventh continent (Lost Desert Continent)

You can use these types of cash to purchase skill points within the Shop or to progress through your Mainland mines.

Mainland mines have their own system of currency. The two types you can find are:
Shards: Used to upgrade your Mainland mines when you’re in them.
Gems: The currency used to purchase and upgrade your Super Managers!