When you clear a lesson, you earn coins (“Money”). These coins (“Money”) can be used to purchase additional Gem Lessons. Click the button “Shop” located in the top-right corner of the Magic Circle to buy these additional Gem Lessons. The purchased Gem Lessons will be accessible from your Gem List. Currently, there are 6 additional Gem Lessons for purchase.
Don’t worry if you do not have enough coins to purchase new Gem Lessons. Continue working your way through your lessons and you’ll have enough coins in no time!