Dreadstone

Source
This item can be obtained via the following means:
 * Prospecting
 * Alchemy level 450 - Transmute: Dreadstone ( + )
 * has a chance of yielding an epic gem.
 * Purchased with from:
 * Purchased with from:
 * Purchased with from:
 * Purchased with from:

Jewelcrafting

 * Defender's Dreadstone
 * Glowing Dreadstone
 * Guardian's Dreadstone
 * Infused Dreadstone
 * Mysterious Dreadstone
 * Puissant Dreadstone
 * Purified Dreadstone
 * Regal Dreadstone
 * Royal Dreadstone
 * Shifting Dreadstone
 * Sovereign Dreadstone
 * Tenuous Dreadstone