The Nephalem Cube is an item that players will acquire during the course of the game, enabling the break-down of items such as armor and weapons — reducing them to raw crafting materials. The Nephalem Cube will function similarly to the Cauldron of Jordan in that players can use it to cash in on items without having to trek back into town. The main difference between the two is that the cauldron will act as a pocket vendor, where as the cube will perform salvaging duties.
The Nephalem Cube can salvage crafting materials from unwanted weapons, armor, rings, amulets, and even runes. Placing an item in the Nephalem Cube will destroy it, but in its place will be a variety of crafting materials. The power of the raw crafting materials is based upon the rarity of the item that was salvaged. Thus, a white weapon will reduce to common mats, where as a rare weapon or piece of armor will break down into magical materials – usable for creating more powerful items and item enhancements.
Nephalem Cube Tooltip
The Nephalem Cube is going to be a very valuable item — both for acquiring materials for crafting, as well as for salvaging precious mats to sell on the auction house.