GemStone Challenge is a columns matching game for the iPhone. The player has to match three or more of the same gem to clear the gems off the board. The trick to matching the gems is the gems fall in a column of three gems. You need to fit the column into the already dropped gems so that the gems make a match and are cleared from the board. The gems continue to fall until the player can make no more matches and the board is full.
The game is played using the touch mechanics of the iPhone. Players use their finger to move the gem columns from side to side to get them to fall in the correct spot. There are 2 game modes, single player or two player. Two player mode allows two players to play against each other using blue tooth or Apple’s Game Center.
If GemStone Challenge sounds like a fun game, you can get it from the Apple App Store.