Part of the Vestments of the Virtuous set:

The set gives these bonuses as more pieces are worn: 2: +8 All Resistances. 4: When struck in combat has a 2% chance of shielding the wearer in a protective shield which will absorb 488 damage. Can only occur once every 60 sec. 6: Increases damage and healing done by magical spells and effects by up to 23. 8: +200 Armor. Set Details | All Sets

Quest Reward from:

Level	Name	Start	Rewards
60	An Earnest Proposition Alliance Ironforge	Deliana Ironforge	6600 XP
60	An Earnest Proposition Horde Orgrimmar	Mokvar Orgrimmar	6600 XP

Disenchants into

Name	Value	Drop%
Large Brilliant Shard	1 Copper	99.0%
Nexus Crystal	1 Copper	1.0%