Collect gems so that they don't overlap with other players, put up a barrier to prevent other players from stealing them, and steal the gems before other players get them.
Players point at the gem tables lined up in the center of the table at the same time. If you're not pointing at the same gem as someone else, all of the gems will be yours. If you choose the same gem as someone else (if you end up batting), everyone who chose the same gem will not be able to get the gem. There is also a bonus for matching three colors of gems, which increases your score, and you can read each other's moves, such as "I really want blue" or "Everyone is going for red, so let's aim for a place that doesn't seem to be popular." The gems you get are "temporarily" placed in your safe. However, from the next time onwards, the "safe" will also be a target for pointing, so there is a possibility that it will be stolen by someone. To prevent this, you can "put up a barrier" to prevent the gems from being stolen, but if you put up a barrier, you will have to pass on your next turn. Do you throw away the chance to get the gem and put up a barrier, or do you get through by bluffing and saying, "I'll put up a barrier, so don't point at me." It's a game that always creates tension and excitement.