Spirit gems are pocket slot items that give a chance of saving a charm when worn while creating Summoning pouches. The six gems are named after gems used in Crafting: spirit sapphire through to spirit onyx. They can be stored in a Spirit gem bag. Spirit gems initially stack in the bank, but once activated (by equipping it), they do not. Activated gems' names have (a) appended (e.g. Spirit sapphire (a)).