The Gauldur Amulet

Quest reward from Forbidden Legend.

Grants a bonus of 30 to Health, Stamina and Magicka.

This item is bugged. If you equip it first, then subsequently attempt to equip a second necklace, both will be equipped. This does not work if you equip a necklace, and then equip The Gauldur Amulet second. Also if your character has a large body it will mold into the flesh of the character creating quite a strange look.

Not only it sometimes creates a strange look on body but it is sometimes invisible when you equip it.