Azura's Star is a powerful Daedric artifact, similar to a Soul Gem, but unique in that it is reusable. It can be used to enchant or recharge powerful items. It appears in The Elder Scrolls III: Morrowind, The Elder Scrolls IV: Oblivion, and The Elder Scrolls V: Skyrim.
Azura's Star is one possible quest reward for The Black Star. Bringing the Broken Azura's Star to Aranea Ienith instead of Nelacar grants the Dragonborn with this Soul Gem-like Daedric artifact. Similar to Soul Gems, Azura's Star has the ability to trap the souls of non-humanoid creatures, known as "white souls". These souls can be used for enchanting and for recharging weapons. Unlike ordinary Soul Gems, Azura's Star is not destroyed after use: it is simply emptied, and must be filled with another soul to be used again. Similarly, if brought to Nelacar, becomes able to trap black souls only and is called from so on The Black Star. It is confirmed that the The Black Star can be used for recharging.