Design: Bright Crimson Spinel (Shattered Sun Offensive)

The Design: Bright Crimson Spinel was a reputation reward; you had to be Friendly with Shattered Sun Offensive to purchase it for from  on Isle of Quel'Danas or  in Shattrath City.

Related Sources
The Scale of the Sands also sell a version of this design. See Design: Bright Crimson Spinel (The Scale of the Sands).