From the back of the box:
Strive to land on the most precious gems, and hang on for a ride. The roll of the dice determines your moves, but your strategy determines your fate.
You finally land on a diamond - and a ruby and two emeralds. But how do you keep them from being taken by the other players? You must roll a "GEMLOK" to make them yours to keep.
Meanwhile, the other players will keep coming and they will not stop. They want those precious gems, and will stop at nothing to get them. Nothing is certain until you roll a "GEMLOK". Even then, each player must secure eight gems, and will encounter significant player strategy along the way before securing their fortune.
Players may find themselves forced to lock in a low value gem or none at all. Avoid being bumped by other players, and don't hesitate to bump them first. There is also the strategy of bumping oneself into a more favorable position. So much fun, interaction and strategy built into Gemlok. Enjoy your Family and Friends as you play Gemlok and HAVE FUN!
2007 Mensa Select