Sha-Touched

Sha-Touched gems are items that fit exclusively in Sha-Touched sockets, much in the manner of cut gems. Currently the only items having Sha-Touched sockets are from Grand Empress Shek'zeer in Heart of Fear, and Tsulong, Lei Shi and Sha of Fear in Terrace of Endless Spring.

Sha-Touched gems are unique-equipped. Wrathion also provides a prismatic socket upgrade for any Sha-Touched weapons in Patch 5.1 via the  [Eye of the Black Prince].

Source

When a player completes the legendary quest  [90] Breath of the Black Prince, they will be offered a choice of three Sha-Touched gems. After that they will be able to purchase additional gems (not necessarily for cheap).

List

There are three Sha-Touched gems:

•  [Crystallized Dread]
•  [Crystallized Horror]
•  [Crystallized Terror]

There are nine Sha-Touched weapons:

Sha-Touched weapons

Weapon	Encounter	Instance
[Claws of Shek'zeer] LFR H	Grand Empress Shek'zeer	Heart of Fear
[Gao-Rei, Staff of the Legendary Protector] LFR H	Tsulong	Terrace of Endless Spring
[Jin'ya, Orb of the Waterspeaker] LFR H	Lei Shi	Terrace of Endless Spring
[Kilrak, Jaws of Terror] LFR H	Sha of Fear	Terrace of Endless Spring
[Kri'tak, Imperial Scepter of the Swarm] LFR H	Grand Empress Shek'zeer	Heart of Fear
[Loshan, Terror Incarnate] LFR H	Tsulong	Terrace of Endless Spring
[Shin'ka, Execution of Dominion] LFR H	Sha of Fear	Terrace of Endless Spring
[Spiritsever] LFR H	Lei Shi	Terrace of Endless Spring
[Taoren, the Soul Burner] LFR H	Lei Shi	Terrace of Endless Spring