Dalaran Mana Gem

Dalaran Mana Gems dropped from the following members of the Kirin Tor in Silverpine Forest:
 * Dalaran Warder
 * Dalaran Protector
 * Dalaran Wizard
 * Dalaran Miner
 * Dalaran Conjuror
 * Dalaran Brewmaster
 * Dalaran Apprentice
 * Dalaran Mage
 * Dalaran Watcher

As a quest objective

 * Gathering Materials (Horde)