66 filled black soul gems, 66 filled grand soul gems, 6 daedra heart, 1 ebony ingot and a book named "Ruined Research Log" found in The Midden Dark of Winterhold College (see screenshot) are required to craft this circlet at Skyforge of Whiterun.
Required mesh and texture of daedric circlet from Johnskyrims HD Armored Circlets (but esp doesn't need to be actived)
http://www.nexusmods.com/skyrim/mods/41603/?
Required mesh and texture of daedric circlet from Johnskyrims HD Armored Circlets (but esp doesn't need to be actived)
http://www.nexusmods.com/skyrim/mods/41603/?