The auction house is starting to have to stack all the ore they're listing for sale out back of the warehouse. Elementium Ore and Obsidium Ore have, in the last few days, been listed in quantities most people would consider unimaginable at prices that make auctioneers cackle. Until they realize that everyone has gotten this amount of stock. Level ones have been cropping up like mushrooms and listing hundreds of stacks of ore per night on every server I've checked into. I'm not the only one who has written about this.
Everyone loves cheap Cataclysm ore. It means cheap blacksmithing goods, cheap gems, cheap enchanting mats, and cheap engineering items. It also has the unique benefit of having the highest price floor of any ore ever introduced to the game. Obsidium prospects into 6 green quality raw gems and an average of 0.3 rare gems per stack, and elementium into 4 green and 1 blue. This means that if you do nothing but cut and vendor the greens for 9g, the "floor" for obsidium is 54g, and elementium is 36g. Then you have the rares. This floor is the bare minimum of what the ore is worth, but it's used for so many things. What else can we do with all of it?