The chicken "Fafnir" lays two new gems each day, and all the players want to acquire these gems on the off chance that they'll be more valuable than the gems they already hold. Whoever throws away the most gems in a round acquires these two newest gems - but you can't throw away the colors of the gems that Fafnir just laid! No chicken will be impressed by you shaming the gems that you're also trying to acquire!
Once a certain number of stones have been discarded in Fafnir, the round ends, and everyone scores for the gems that they've collected. Gold is worth 1 point each no matter how many have been collected, so go for gold if you want to play it safe. As for the five colors of gems, whichever one appears most frequently is worth 3 points each, while the second most frequent color gem is worth 2 points each, and all other gems are worth -1 point each.