A planet full of gems - and anxiety! In the not so distant future, scientists discover very special stones on another planet that, when combined, can turn them into an extremely valuable gem or fuel. After hearing about the stones, you decide to travel to this new planet to take advantage of this profitable venture. You arrive safely, but now your spacecraft is out of fuel! What a dilemma! You want to make valuable gems, but you also need fuel to get back to Earth. Can you collect more gems than your rivals and still escape from the planet in Troika?