Crystal Scarab

Crystal Scarabs are beetle-shaped figurines made of blue crystals set in a gold frame.

Source
This item drops from Trash Mobs in the Temple of Ahn'Qiraj and the Ruins of Ahn'Qiraj.

As a quest objective

 * Avenger's Crown (quest)
 * Avenger's Pauldrons (quest)
 * Band of Veiled Shadows (quest)
 * Cloak of the Unseen Path (quest)
 * Conqueror's Crown (quest)
 * Deathdealer's Boots (quest)
 * Deathdealer's Leggings (quest)
 * Doomcaller's Robes (quest)
 * Drape of Vaulted Secrets (quest)
 * Enigma Boots (quest)
 * Genesis Trousers (quest)
 * Mace of Unending Life (quest)
 * Ring of Unspoken Names (quest)
 * Sickle of Unyielding Strength (quest)
 * Stormcaller's Diadem (quest)
 * Stormcaller's Pauldrons (quest)
 * Striker's Pauldrons (quest)
 * Vestments of the Oracle (quest)