Amethyst Aegis

The Amethyst Aegis is a rare type of shield. The body of the shield appears to be made entirely of one giant, cut, crystal of amethyst, the facets of which appear to sparkle when it is rotated. This is capped with decorative golden metal at the corners of the shield and at the center of the front of the shield.

Acquisition
The Amethyst Aegis can be found:

Core
 * Isle of the Nameless
 * Zaishen Chest
 * The Fissure of Woe
 * Chest of Woe
 * The Underworld
 * Underworld Chest

Eye of the North
 * Depths of Tyria
 * Slavers' Exile
 * Chest of the Slaver (Forgewight)
 * Chest of the Slaver (Justiciar Thommis)
 * Chest of the Slaver (Rand Stormweaver)
 * Hierophant's Chest

Drop research is ongoing and can be found here.

Dye
Dye affects the entire shield except the golden metallic regions. The crystal is tinted depending on the dye color specified. It will dye to an inverse of the color applied (with the exception of silver, white and black dyes) but this will only show in only some facets of the crystal - which facets appear tinted depends on the viewing angle; some facets will always retain their magenta coloring at any given viewing angle. Although the golden metallic cornices are not affected by dye, they are shown to be affected on the inventory icon. The default color can be closely replicated using yellow dye.