Gems
The Altar of Gems is the shining purple building in your village. It creates gems, the game's premium currency, over time. Special items are required to activate it. The first activation is free, and can be done immediately after you begin playing. Three hours will be required before the gems it produces are available. Complete achievements to get a chance of earning a gem reward.
Villager huts
You will need to build additional villager huts as your village grows. This will let more people move into your village, as well as increase its income. You will occasionally be able to collect a random resource from your villagers.