Final Fantasy Crystal Chronicles: Echoes of Time jewels

Jewels are special items in Final Fantasy Crystal Chronicles: Echoes of Time which grant special abilities to pieces of equipment, mostly abilities found in Final Fantasy Crystal Chronicles: Ring of Fates, though there are some new ones due to the addition of Magic Defense and elemental/stat growth abilities. In order to use these abilities, the player must collect jewels, either from treasure chests in hard-to-reach areas, from defeating bosses or the Mimic in some areas, or by turning old equipment into jewels through the crafting shop in Town. The player must then go to the crafting shop and select the Customize option, then at the cost of 100 gil per stone, can set a stone they have acquired into any empty slots in the appropriate piece of equipment. Equipment that comes with abilities cannot have their abilities removed, unlike abilities put onto equipment via jewels.