Elemental Gem, Blue Sapphire

D&D 2014 item: Elemental Gem, Blue Sapphire. Source: Dungeon Master's Guide (2014). type Wondrous Item, Uncommon rarity This gem contains a mote of elemental energy. When you use an action to break the gem, an air elemental is summoned as if you had cast the conjure elemental spell, and the gem's magic is lost. Wondrous Item Uncommon

Source: Dungeon Master's Guide (2014), p. 167 - Licenses and attribution