"Bored of mundane board games and looking for something that sparkles? Introducing Gemstone Caverns by ThinkFun. The Gem Buyer wants groups of 5 or more gems and you are looking to make some profit! Roll for your riches as you drop the gemstone dice down the mine shaft. Set the the pattern on the sifter and all players record the pattern on their scoresheet carts. Flip and rotate the gems to get as many groups as you can to score big! Remember, the Gem Buyers want as many groups of 5 or more that they can purchase, so don't rely on one group of many gems. Roll, rotate, and maximize the value of your cart using logic and spatial recognition. Perfect for 2-4 Miners Searching for their Riches!