Please note that some information on this wiki is still based on the demo version.
If you notice any errors, feel free to correct them.
Gold
From Super Fantasy Kingdom Official Wiki
Gold is a Resource in Super Fantasy Kingdom, used to acquire Buildings and to make 
Ingots.
Collecting
Gold can be directly harvested from 
Ore when a Worker is assigned to a 
Goldmine or they can be mined from the 
Gold Vein once developed.
2 Gold can be collected by building the Gold Outpost
Crafting
One Gold can be used to make one Ingot in the 
Smelter when a Worker is assigned to it.
Building
The following buildings need Gold to be built.
Upgrading
The following buildings need Gold to be upgraded
Source
Depletable
