This is another Tetris-based game, using groups of coloured gems instead of blocks.
In the By-stages mode the objective is destroy gems (one or two players can play), joining groups of gems of the same colour.
But the coolest thing in this game is the One to One mode. In this mode, if one player eliminates more than four gems at the same time, a group of stones falls in the other player's board.
Try it with a friend!