There are five different types of Gems in The Sandbox Luck, Magic, Speed, Defense, and Power. These Gems determine the strengths and attributes of equipment NFTs. Gems are ERC-20 utility tokens burned after use and can be earned through staking rewards. Moreover, when creating an item, you will need CATALYSTs, another ERC-20 token that determines the number of Gem sockets for an item. This, in turn, determines the tier of the item.