Instructions
Search the area around your starting village for the digging bar, which looks like a brown stick with yellow sparkles. Look in piles of rocks close to your town square.
Dig out the digging bar by either selecting the rocks and removing them yourself or picking up a Kefling and placing her on the rocks.
Pick up the digging bar once you've cleared a path to it.
Select a gem patch or place a Kefling on a gem patch to harvest crystals.
Pick up the crystals and bring them to a building where then can be used for materials or refined into other components.