How to get gems?

Slurp! Gem acquisition is the core of the economy, so you must act with meticulous planning, hmph. Daily quests and defeating the Niflung are just the basics, and once you unlock 4 villages, you can also mine gems in the Gem Mine. I'm kindly informing you, so wisely invest your gems in your prosperity level and hero enhancements, you see, hmm!