Twilight Opal

Source
Twilight Opals can be mined rarely from Rich Saronite and Cobalt Deposits, and Titanium Veins. They may also be mined from some mobs, and prospected from cobalt or saronite ore.

In Patch 3.2, this gem is no longer available for purchase from any vendor, and has been replaced by its epic version, Dreadstone.

Engineering

 * Heartseeker Scope
 * Truesight Ice Blinders

Jewelcrafting

 * Runed Mana Band
 * Figurine - Twilight Serpent


 * Balanced Twilight Opal
 * Defender's Twilight Opal
 * Glowing Twilight Opal
 * Guardian's Twilight Opal
 * Infused Twilight Opal
 * Mysterious Twilight Opal
 * Puissant Twilight Opal
 * Purified Twilight Opal
 * Regal Twilight Opal
 * Royal Twilight Opal
 * Shifting Twilight Opal
 * Sovereign Twilight Opal
 * Tenuous Twilight Opal