You may know about a daily fake rock in your town that breaks into a gem. Well there is a secret way to get up to 9 gems in one day! When you go to find the money rock, hold a silver shovel. Every day, there is a chance that when you hit the money rock with a silver shovel, gems will come out instead of money. You can get a maximum of 8 gems from it along with your daily gem rock, giving you 9 gems.
