What you will need. 1 jewel crafter 350+ 1 enchanter 275 + tons of adamantite powder, primal earths, and felsteel bars and one Thick Felsteel Necklace design. which can be found. Design: Thick Felsteel Necklace - Items - World of Warcraft
The key thing here is to make the necklaces then de them for large prismatic shard. now on my sever mats are fairly more priced so it costs me about 5 gold per necklace but I can sell the shards for 25-30 gold so I make a fairly good profit. And the powder/primals are cake to farm or can be bought off ah for about 2 gold per primal and 5 gold per 20 powders. hope this helps