The exact value of the number of gems you will get is still being tested by us since there are instances that your gem count will be reset when you relaunch the game after using the Project QT mod APK. Still, we have a working hypothesis that using certain items while hacking Gems will automatically cause a reset in your gem count from time to time (we think the frequency is around every 30 minutes). So far, each Gems Summon is now worth around 5-6 gems, depending on your luck. We'll post the exact value as soon as we figure it out.