So, since there is only a limited amount of gems, you should know how to use them properly. I won’t write a long guide about, but I will post a video that shows gameplay and how to use gems. This particular girl plays the game and uses the gems in a really smart way. She uses them only when she needs it and thinks that it will boost the productivity.
The video is about 15 minutes long and provides lots of tips when it comes to using gems. Hopefully you will learn something new today!