If you remember back when I started writing for JMTC, and back before Cataclysms release I put out a little list on what the top 5 items will be to stockpile for Cataclysm would be. One of the 5 items were abyss crystals. Now you might be thinking.. But Mageshadow... these are completely worthless there are new enchants and no one is going to want these stupid crystals. Wrong
These crystals are gold, pure gold. Not only can you make a good tank enchant with them ( +40 Stamina to Bracer ), but you can also shatter them for insane amounts of gold. Wrath enchanting materials have inflated, dusts are 3-5g per, while greater cosmic essences are in the 10-15g range.
According to The Undermine Journal, on most servers abyss crystals are in the 5-20g range ( check out the graph below ). You normally get anywhere from 7-19 dust per shatter and 2-6 Greater Cosmic Essence per shatter. Either way if you buy the crystals for 20g per you're going to be making heaps of gold.
|Abyss Crystals Prices on All US Servers - Blue dot = 8g - Red Dot = 10g|
Depending on your servers prices, you can make anywhere from 30-50g per crystal. It only takes a couple seconds worth of work shattering these crystals. Price will of course vary from server to server but on most they should be profitable ( with the exception of outliers )