Band of Cenarius

Band of Cenarius is a rare ring with a nice boost to Nature Resistance.

Source
This item is a reward from the Horde and Alliance quest which starts with Aurel Goldleaf in Cenarion Circle in Silithus. To complete the quest, you must turn the following item to Aurel Goldleaf:
 * 1 Abyssal Scepter

You must also be Honored with Cenarion Circle.