Ornate Amethyst Quilen

There are 2 tameable creatures with this look.

Ornate Amethyst Quilen
Exotic family: Beast Masters only - level 10+.Exotic Family
Can only be used by Beast Mastery hunters that have reached level 10.
Stone HoundsLevelLocation
Can Be Tamed
Vale of Eternal Blossoms
Retains its original name after taming.
See this video for tracking information.
Can Be Tamed
BossMogu'shan Vaults (Raid)
One of The Stone Guard bosses. In 10-player mode only three of the four possible guardians will be present in a given week.
Level scaling: Most NPCs will scale with the Hunter's level, within the constraints of their level range. Hunters can tame regular NPCs up to 2 levels higher than them, but can only tame elite NPCs of the hunter's level or below.