Brilliant Tourmaline

Brilliant Tourmaline is a gem that matches a Red Socket.

Source
This item is bought from the following vendors for :
 * Dealer Senzik at the Stormspire in Netherstorm
 * Inessera at Aldor Rise in Shattrath City
 * Lisrythe Bloodwatch at Scryer's Tier in Shattrath City
 * Markus Scylan at Honor Hold in Hellfire Peninsula
 * Reagan Mancuso at Thrallmar in Hellfire Peninsula