• A Gem ( Gem ) is a form of currency in Monster Legends. You can purchase Gems with real money (via credit card or cellphone), and earn them in both Monster Arena and Adventure Map, through Achievements and Goals, by completing Monster Book collections, or winning 50 gems in the Monday Reward, and in many other ways. It is worth more than Gold. A player can spend gems on upgrading buildings and habitats, buying more workers, unlocking islands, purchasing various items inside store, speeding up processes such as breeding and hatching time, or being converted in gold or food within the game.