Design: Bright Crimson Spinel (The Scale of the Sands)

The Design: Bright Crimson Spinel was a reputation reward; you had to be Friendly with The Scale of the Sands to purchase it for from  in Hyjal Summit.

Related Sources
The Shattered Sun Offensive also sell a version of this design. See Design: Bright Crimson Spinel (Shattered Sun Offensive).