Gems can be found through adventuring in various worlds or bought via random boxes via the in-game store, with gems coming in a variety of different types with different effects. Games can also be leveled up by enterprising players, with more powerful gems also being capable of leveling up further. It’s all a very ornate system; you can find out more with the full preview, and you can also check out the latest expansion trailer just below. You could also pick up the new Extra Life bundle to get an assortment of gewgaws for the game while also supporting charity.
Update: Trion has clarified that these gems will not be sold in the Empowered Gem Boxes coming to the Trove Store: “Gems can only be picked up during your adventures in game while Gem-related items, such as boosters and gem dust, come in the empowered boxes.”
Source: Official Site