Hidden Math Gems Home Hidden Math Gems 0.0 / 5 ( 0 votes ) Your Rating? Discover Hidden Math Gems – Play Free Now on WebGameFree! Hidden Math Gems is a speed-based puzzle. Dig deep into the Earth in order to uncover rubies, sapphires, emeralds, and diamonds. Each different type of the gem is worth a different amount of points and will also require a different amount of clicks to acquire. Categories in which Hidden Math Gems is included: Multiplayer Running 1 Player