A cube of pure tungsten, 1000 feet wide on each side, sits flat in the middle of a grassy field on Earth. The owner of the field wishes to sell the tungsten. What is the most cost effective method, using existing technology, of bringing this tungsten to market? Note that tungsten has limited commercial value in the form of monolithic cube: it must be broken into pieces.
Do not concern yourself with the issue of the tungsten's actual market value, or the fact that the price of tungesten will likely go down dramatically over the course of this mining project. This question is just about how to most easily and cheaply chop up this big hunk of tungsten.